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6at4

E. coli phosphoenolpyruvate carboxykinase bound to thiosulfate

Method: X-RAY DIFFRACTION Dmax: 107.7 Å Quality: GOOD
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Phosphoenolpyruvate carboxykinase (ATP)

Escherichia coli K-12

UniProt P22259

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein monomer Monomer Protein × 1 PDB declaration: monomeric（1） Consistent with protein copy count Chain A； UniProt 1–540 Not recorded THJ THIOSULFATE × 3 X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；293 K；20% PEG 3350, 0.4 M sodium chloride, 0.1 M Bis-Tris pH 5.5, 0.1 M sodium thiosulfate Resolution 1.33 Å R-free 0.151
2 Protein monomer Monomer Protein × 1 PDB declaration: monomeric（1） Consistent with protein copy count Chain B； UniProt 1–540 Not recorded THJ THIOSULFATE × 2 X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；293 K；20% PEG 3350, 0.4 M sodium chloride, 0.1 M Bis-Tris pH 5.5, 0.1 M sodium thiosulfate Resolution 1.33 Å R-free 0.151

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB Difference from Current Entry 6AT4 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
11KO Structure of Escherichia coli phosphoenolpyruvate carboxykinase with bound ATP, Mg2+, and Mn2+ Deposited 2026-03-02 Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 2–540（539 aa）
Not recorded ATP ADENOSINE-5'-TRIPHOSPHATE × 1 MN MANGANESE (II) ION × 2 MG MAGNESIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；4 ul drop with 4 mg/mL protein, 1 mM ADP, 1 mM phosphoenol pyruvate, 2.5 mM MgCl2, 2.5 mM MnCl2, 1 mM EDTA, 100 mM sodium acetate (pH 4.5), 200 mM ammonium acetate and 12% PEG 4000 was allowed to equilibrate with a 1 mL reservoir of 100 mM sodium acetate, 200 mM ammonium acetate and 31% PEG 4000
Resolution 1.58 Å R-free 0.185
1AQ2 PHOSPHOENOLPYRUVATE CARBOXYKINASE Deposited 1997-08-05 Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Not recorded MN MANGANESE (II) ION × 1 MG MAGNESIUM ION × 1 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 PYR PYRUVIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.4；pH 4.4
Resolution 1.90 Å R-free 0.260
1AYL PHOSPHOENOLPYRUVATE CARBOXYKINASE Deposited 1995-12-07 Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Not recorded OXL OXALATE ION × 1 MG MAGNESIUM ION × 1 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.80 Å R-free 0.234
1K3C Phosphoenolpyruvate carboxykinase in complex with ADP, AlF3 and Pyruvate Deposited 2001-10-02 Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Not recorded MG MAGNESIUM ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 AF3 ALUMINUM FLUORIDE × 1 PYR PYRUVIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.8；294 K；ADP, Aluminum Nitrate, Magnesium Chloride, Sodium Fluoride, Pyruvate, EDTA, ammonium acetate, sodium acetate buffer, dithiothreitol, PEG 4000, pH 4.8, VAPOR DIFFUSION, HANGING DROP, temperature 294.0K
Resolution 2.00 Å R-free 0.285
1K3D Phosphoenolpyruvate carboxykinase in complex with ADP and AlF3 Deposited 2001-10-02 Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Not recorded MG MAGNESIUM ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 AF3 ALUMINUM FLUORIDE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.8；294 K；ADP, Aluminum Nitrate, Magnesium Chloride, Sodium Fluoride, EDTA, ammonium acetate, sodium acetate buffer, dithiothreitol, PEG 4000, pH 4.8, VAPOR DIFFUSION, HANGING DROP, temperature 294.0K
Resolution 2.00 Å R-free 0.266
1OEN PHOSPHOENOLPYRUVATE CARBOXYKINASE Deposited 1995-09-08 Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Not recorded ACT ACETATE ION × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.90 Å R-free 0.244
1OS1 Structure of Phosphoenolpyruvate Carboxykinase complexed with ATP,Mg, Ca and pyruvate. Deposited 2003-03-18 Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Not recorded MG MAGNESIUM ION × 1 CA CALCIUM ION × 1 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 PYR PYRUVIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.8；294 K；ADP, Calcium Chloride, Magnesium Chloride, PEP, EDTA, ammonium acetate, sodium acetate buffer, dithiothreitol, PEG 4000, pH 4.8, VAPOR DIFFUSION, HANGING DROP, temperature 294K
Resolution 1.80 Å R-free 0.250
2OLQ How Does an Enzyme Recognize CO2? Deposited 2007-01-19 Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Not recorded MN MANGANESE (II) ION × 1 MG MAGNESIUM ION × 1 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 CO2 CARBON DIOXIDE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 4.5；298 K；30% P4000, 0.1 M sodium acetate pH 4.5, 0.2 M ammonium acetate, VAPOR DIFFUSION, temperature 298K
Resolution 1.94 Å R-free 0.235
2OLR Crystal structure of Escherichia coli phosphoenolpyruvate carboxykinase complexed with carbon dioxide, Mg2+, ATP Deposited 2007-01-19 Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Not recorded MG MAGNESIUM ION × 1 CL CHLORIDE ION × 1 CO2 CARBON DIOXIDE × 2 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.4；293 K；8 microL drops: 8 mg/ml protein concentration, 2 mM ATP, 5 mM oxalate, 100 mM sodium acetate (pH 4.4), 200 mM ammonium acetate, 12% PEG 4000, 1 ml resevoir: 100 mM sodium acetate, 200 mM ammonuim acetate, 27% PEG 4000, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 1.60 Å R-free 0.198
2PXZ E. coli phosphoenolpyruvate carboxykinase (PEPCK) complexed with ATP, Mg2+, Mn2+, carbon dioxide and oxaloacetate Deposited 2007-05-14 Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain X 1–540（540 aa）
Not recorded MG MAGNESIUM ION × 1 MN MANGANESE (II) ION × 1 OAA OXALOACETATE ION × 1 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 CO2 CARBON DIOXIDE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.4；294 K；8ul drop with 8ug/ml protein, 2mM ADP, 5mM MgCl2, 10 uM MnCl2, 1 mM EDTA, 100 mM sodium acetate (pH 4.4), 200 mM ammonium acetate and 12% w/v PEG 4000 was allowed to equilibrate with a 1 ml reservoir of 100 mM sodium aceate, 200 mM ammonium acetate and 27% PEG 4000. After crystals grew for one week 2ul of a 1 mM EDTA and saturated sodium oxaloacetate solution was added to the drop. 5 ul of glycerol was added to the drop. A 0.1 x 0.1 x 0.3 mm crystal was removed with a loop and flash cooled in liquid nitrogen, VAPOR DIFFUSION, HANGING DROP, temperature 294K
Resolution 2.23 Å R-free 0.234
2PY7 Crystal structure of E. coli phosphoenolpyruvate carboxykinase mutant Lys213Ser complexed with ATP-Mg2+-Mn2+ Deposited 2007-05-15 Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain X 1–540（540 aa）
Mutation：K213S MG MAGNESIUM ION × 1 MN MANGANESE (II) ION × 2 ATP ADENOSINE-5'-TRIPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.6；293 K；A 2ul drop with 4 mg/ml protein, 20 mM Tris-HCl (pH 7.6), 0.5 mM EDTA, 5 mM ADP, 2.5 mM phosphoenolpyruvate, 2.5 mM MgCl2, 2.5 mM MnCl2, 0.1 M sodium acetate, 0.05 M sodium cacodylate (pH 6.5), 15% PEG 8000 was allowed to equilibrate with a 1 ml well of 0.2 M sodium aceate, 0.1 M sodium cacodylate 30% PEG 8000. After a week a 0.1 x 0.1 x 0.4 mm crystal was removed and put in a small volume of well solution with 30% glycerol added. The crystal was put into a loop and flash cooled in liquid notrogen, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 2.20 Å R-free 0.218
6ASI E. coli phosphoenolpyruvate carboxykinase G209S mutant bound to methanesulfonate Deposited 2017-08-24 Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Mutation：G209S ATP ADENOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 MN MANGANESE (II) ION × 1 03S methanesulfonic acid × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；16% PEG 3350, 0.1 M Bis-Tris pH 5.5, 0.3 M sodium chloride, 0.1 M sodium methanesulfonate
Resolution 1.79 Å R-free 0.185
6ASM E. coli phosphoenolpyruvate carboxykinase G209S K212C mutant bound to thiosulfate Deposited 2017-08-25 Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Mutation：G209S, K212C ATP ADENOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 MN MANGANESE (II) ION × 1 XE XENON × 1 BTB 2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL × 1 THJ THIOSULFATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；20% PEG 3350, 0.1 M Bis-Tris pH 5.5, 0.4 M sodium chloride
Resolution 1.55 Å R-free 0.188
6ASN E. coli phosphoenolpyruvate carboxykinase K212I F216V mutant bound to methanesulfonate Deposited 2017-08-25 Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Mutation：K212I, F216V SO4 SULFATE ION × 3 03S methanesulfonic acid × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；0.16 M ammonium sulfate, 0.08 M sodium acetate pH 4.8, 20% PEG 4000, 15% v/v glycerol
Resolution 1.55 Å R-free 0.193
6AT2 E. coli phosphoenolpyruvate carboxykinase G209N mutant bound to thiosulfate Deposited 2017-08-27 Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Mutation：G209N ATP ADENOSINE-5'-TRIPHOSPHATE × 1 MN MANGANESE (II) ION × 1 MG MAGNESIUM ION × 1 TRS 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL × 1 THJ THIOSULFATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；24% PEG 3350, 0.4 M sodium chloride, 0.1 M Bis-Tris pH 5.5, 0.1 M sodium thiosulfate
Resolution 1.44 Å R-free 0.191
6AT3 E. coli phosphoenolpyruvate carboxykinase Y207F mutant bound to thiosulfate and oxaloacetate Deposited 2017-08-27 Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric
Chain A 1–540（540 aa）
Chain B 1–540（540 aa）
Mutation：Y207F Mutation：Y207F OAA OXALOACETATE ION × 1 THJ THIOSULFATE × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；24% PEG 3350, 0.4 M sodium chloride, 0.1 M Bis-Tris pH 5.5, 0.1 M sodium thiosulfate
Resolution 1.46 Å R-free 0.219
6COM 2.3A crystal structure of E. coli phosphoenolpyruvate carboxykinase mutant Asp269Asn Deposited 2018-03-12 Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–540（540 aa）
Mutation：D269N ATP ADENOSINE-5'-TRIPHOSPHATE × 1 PYR PYRUVIC ACID × 1 CA CALCIUM ION × 1 MG MAGNESIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions MICROBATCH；pH 8.2；293 K；A 2ul drop with 2 mg/ml protein, 5 mM Calcium chloride, 5mM Magnesium chloride, 2 mM ATP, 2mM Pyruvate, 1 mM EDTA, 200 mM Ammonium acetate, 100 mM Sodium acetate, 0.01 mM DTT, 30% PEG 4000 was added to 2 ul drop containing 2 M sodium aceate, 0.1 M Tris pH 8.2 30% PEG 4000. After a week a rod like crystal was removed and soaked in a solution with 30% glycerol 1mM EDTA, 100 mM sodium acetate 200mM ammonium acetate and 12% PEG 4000. The crystal was put into a loop and flash cooled in liquid notrogen
Resolution 2.30 Å R-free 0.209

17 other PDB entries and 17 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name PCKA_ECOLI
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–540； UniProt 1–540 Author chain B； PDBConstruct 1–540； UniProt 1–540

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 6at4

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 6at4
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2. Structure Basics 2. Structure Basics

Entry ID entry_id6at4
Deposition date deposition_date2017-08-27
Structure title titleE. coli phosphoenolpyruvate carboxykinase bound to thiosulfate
Keywords keywordsNonnative ligand, LYASE; LYASE
Experimental Method methodX-RAY DIFFRACTION
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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier33.69 Å
Radius of gyration Rg (electron density) rg_electron33.04 Å
Forward intensity I(0) i0210666000.00
Molecular weight molecular_weight116940.0 kDa
Excluded volume excluded_volume146250 ų
Envelope volume envelope_volume176470 ų
Hydration-shell volume shell_volume43789 ų
Envelope diameter envelope_diameter110.6 Å
Shell Rg shell_rg40.54 Å
Envelope Rg envelope_rg32.63 Å
Shape Rg shape_rg33.04 Å
Total Rg total_rg33.56 Å
Total atoms total_atoms16075
Residues n_residues1069
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 Å−1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3
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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax107.7 Å
Rg (real space) rg_real33.67 Å
Rg uncertainty (real space) rg_real_error0.76 Å
I(0) (real space) i0_real2.1070e+08
I(0) uncertainty (real space) i0_real_error3.1320e+06
Rg (reciprocal space) rg_reciprocal33.69 Å
I(0) (reciprocal space) i0_reciprocal210700000.0000
Solution quality estimate total_estimate0.8960
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary34.4 Å
Skewness Skewness skewness0.273
Kurtosis Kurtosis kurtosis-0.620
Angular range angular_range— – 0.2350 Å−1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha92270000.0000
Real-space data points n_real_points48
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.923; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.977; Smooth: 0.898
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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (3)

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7. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd6at4a1
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.109 — PEP carboxykinase N-terminal domain
Superfamily Superfamily superfamilyc.109.1 — PEP carboxykinase N-terminal domain
Family Family familyc.109.1.1 — PEP carboxykinase N-terminal domain
Domain ID domain_idd6at4a2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.91 — PEP carboxykinase-like
Superfamily Superfamily superfamilyc.91.1 — PEP carboxykinase-like
Family Family familyc.91.1.1 — PEP carboxykinase C-terminal domain
Domain ID domain_idd6at4b1
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.109 — PEP carboxykinase N-terminal domain
Superfamily Superfamily superfamilyc.109.1 — PEP carboxykinase N-terminal domain
Family Family familyc.109.1.1 — PEP carboxykinase N-terminal domain
Domain ID domain_idd6at4b2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.91 — PEP carboxykinase-like
Superfamily Superfamily superfamilyc.91.1 — PEP carboxykinase-like
Family Family familyc.91.1.1 — PEP carboxykinase C-terminal domain

CATH v4.4 (6 domains)

Domain ID domain_id6at4A01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology449 — Phosphoenolpyruvate Carboxykinase; domain 1
Homologous superfamily homologous superfamily10 — Phosphoenolpyruvate Carboxykinase, domain 1
Domain ID domain_id6at4A02
Class class2 — Mainly Beta
Architecture architecture170 — Beta Complex
Topology topology8 — Phosphoenolpyruvate Carboxykinase; domain 2
Homologous superfamily homologous superfamily10 — Phosphoenolpyruvate Carboxykinase, domain 2
Domain ID domain_id6at4A03
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology228 — Phosphoenolpyruvate Carboxykinase; domain 3
Homologous superfamily homologous superfamily20 —
Domain ID domain_id6at4B01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology449 — Phosphoenolpyruvate Carboxykinase; domain 1
Homologous superfamily homologous superfamily10 — Phosphoenolpyruvate Carboxykinase, domain 1
Domain ID domain_id6at4B02
Class class2 — Mainly Beta
Architecture architecture170 — Beta Complex
Topology topology8 — Phosphoenolpyruvate Carboxykinase; domain 2
Homologous superfamily homologous superfamily10 — Phosphoenolpyruvate Carboxykinase, domain 2
Domain ID domain_id6at4B03
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology228 — Phosphoenolpyruvate Carboxykinase; domain 3
Homologous superfamily homologous superfamily20 —
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8. Citations (1)

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9. Files and Curves (10)