Current Protein Identity：P03989
New Search
Difference tags compare only the current result set; every original PDB and assembly record remains separate.
Related-Structure Differences
Each row represents one biological assembly in one PDB entry; multiple monomers of the same protein are listed separately.
| PDB Entry | Assembly / Oligomeric State | Construct | Mutations and Modifications | Ligands, Ions and Non-polymers | Experimental Method | Experimental Conditions | Structure Quality |
|---|---|---|---|---|---|---|---|
| 1HSA THE THREE-DIMENSIONAL STRUCTURE OF HLA-B27 AT 2.1 ANGSTROMS RESOLUTION SUGGESTS A GENERAL MECHANISM FOR TIGHT PEPTIDE BINDING TO MHC Deposited 1992-08-11 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
THE FRAGMENT CRYSTALLIZED WAS THE EXTRACELLULAR PORTION OF
THE PROTEIN CLEAVED FROM DETERGENT MICELLES WITH PAPAIN
|
Resolution 2.10 Å |
| 1HSA THE THREE-DIMENSIONAL STRUCTURE OF HLA-B27 AT 2.1 ANGSTROMS RESOLUTION SUGGESTS A GENERAL MECHANISM FOR TIGHT PEPTIDE BINDING TO MHC Deposited 1992-08-11 | Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain D
25–300（276 aa）
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
THE FRAGMENT CRYSTALLIZED WAS THE EXTRACELLULAR PORTION OF
THE PROTEIN CLEAVED FROM DETERGENT MICELLES WITH PAPAIN
|
Resolution 2.10 Å |
| 1JGD HLA-B*2709 bound to deca-peptide s10R Deposited 2001-06-25 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | GOL GLYCEROL × 1 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；PEG 8000, Tris-HCl, NaCl; glycerol as cryo protectant, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K
|
Resolution 1.90 Å R-free 0.194 |
| 1JGE HLA-B*2705 bound to nona-peptide m9 Deposited 2001-06-25 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；PEG 8000, Tris-HCl, NaCl; PEG 400 as cryo protectant, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K
|
Resolution 2.10 Å R-free 0.250 |
| 1K5N HLA-B*2709 BOUND TO NONA-PEPTIDE M9 Deposited 2001-10-11 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：HLA-B*2709 heavy chain, extracellular domain
|
Not recorded | GOL GLYCEROL × 2 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 9；291 K；PEG 8000, Bicine, NaCl, glycerol as cryo protectant, pH 9.00, VAPOR DIFFUSION, HANGING DROP, temperature 291K
|
Resolution 1.09 Å R-free 0.148 |
| 1UXS CRYSTAL STRUCTURE OF HLA-B*2705 COMPLEXED WITH THE LATENT MEMBRANE PROTEIN 2 PEPTIDE (LMP2)OF EPSTEIN-BARR VIRUS Deposited 2004-03-01 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：EXTRACELLULAR DOMAIN, RESIDUES 25-300
|
Not recorded | GOL GLYCEROL × 4 | X-RAY DIFFRACTION |
X-ray crystallization conditions
pH 7.5；0.1M TRIS, PH 7.5, 15% PEG8000
|
Resolution 1.55 Å R-free 0.177 |
| 1UXW CRYSTAL STRUCTURE OF HLA-B*2709 COMPLEXED WITH THE LATENT MEMBRANE PROTEIN 2 PEPTIDE (LMP2) OF EPSTEIN-BARR VIRUS Deposited 2004-03-01 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：EXTRACELLULAR DOMAIN, RESIDUES 25-300
|
Not recorded | GOL GLYCEROL × 5 | X-RAY DIFFRACTION |
X-ray crystallization conditions
pH 8.5；0.1M TRIS, PH 8.5, 21% PEG8000
|
Resolution 1.71 Å R-free 0.190 |
| 1W0V Crystal Structure Of HLA-B*2705 Complexed With the self-Peptide TIS from EGF-response factor 1 Deposited 2004-06-14 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：EXTRACELLULAR DOMAIN, RESIDUES 25-300
|
Not recorded | GOL GLYCEROL × 2 | X-RAY DIFFRACTION |
X-ray crystallization conditions
pH 8；18% PEG8000, 0.1M TRIS PH 8.0
|
Resolution 2.27 Å R-free 0.246 |
| 1W0W Crystal Structure Of HLA-B*2709 Complexed With the self-Peptide TIS from EGF-response factor 1 Deposited 2004-06-14 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：EXTRACELLULAR DOMAIN, RESIDUES 25-300
|
Not recorded | GOL GLYCEROL × 2 | X-RAY DIFFRACTION |
X-ray crystallization conditions
pH 8.5；20% PEG8000, 0.1M TRIS PH 8.5
|
Resolution 2.11 Å R-free 0.245 |
| 2BSR Crystal structures and KIR3DL1 recognition of three immunodominant viral peptides complexed to HLA-B2705 Deposited 2005-05-23 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：RESIDUES 25-300
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
pH 6.5；pH 6.50
|
Resolution 2.30 Å R-free 0.280 |
| 2BSS Crystal structures and KIR3DL1 recognition of three immunodominant viral peptides complexed to HLA-B2705 Deposited 2005-05-23 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：EXTRACELLULAR DOMAIN, RESIDUES, 25-300
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
pH 6.5；pH 6.50
|
Resolution 2.00 Å |
| 2BST Crystal structures and KIR3DL1 recognition of three immunodominant viral peptides complexed to HLA-B2705 Deposited 2005-05-23 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：RESIDUES 25-300
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
pH 6.5；pH 6.50
|
Resolution 2.10 Å |
| 3B3I Citrullination-dependent differential presentation of a self-peptide by HLA-B27 subtypes Deposited 2007-10-22 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：EXTRACELLUAR DOMAIN, RESIDUES 25-300
|
Not recorded | GOL GLYCEROL × 6 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；0.1 M Tris, 25% PEG 8000, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K
|
Resolution 1.86 Å R-free 0.233 |
| 3B6S Crystal Structure of hla-b*2705 Complexed with the Citrullinated Vasoactive Intestinal Peptide Type 1 Receptor (vipr) Peptide (residues 400-408) Deposited 2007-10-29 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：EXTRACELLULAR DOMAIN, RESIDUES 25-300
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 7.5；281 K；0.1M Tris HCl, 24% PEG 8000, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 281K
|
Resolution 1.80 Å R-free 0.223 |
| 3BP4 The high resolution crystal structure of HLA-B*2705 in complex with a Cathepsin A signal sequence peptide pCatA Deposited 2007-12-18 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：HLA-B*2705 extracellular domain, UNP residues 25-300
|
Not recorded | GOL GLYCEROL × 2 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 7.5；291 K；23% PEG 8000, 0.1M Tris buffer pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K
|
Resolution 1.85 Å R-free 0.222 |
| 3BP7 The high resolution crystal structure of HLA-B*2709 in complex with a Cathepsin A signal sequence peptide, pCatA Deposited 2007-12-18 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：HLA-B*2709 extracellular domain, UNP residues 25-300
|
Not recorded | GOL GLYCEROL × 1 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 7.5；291 K；23.5% PEG 8000, 0.1M Tris buffer pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K
|
Resolution 1.80 Å R-free 0.204 |
| 3CZF Crystal structure of HLA-B*2709 complexed with the glucagon receptor (GR) peptide (residues 412-420) Deposited 2008-04-29 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：EXTRACELLULAR DOMAIN, RESIDUES 25-300
|
Not recorded | GOL GLYCEROL × 3 | X-RAY DIFFRACTION |
X-ray crystallization conditions
pH 7.5；291 K；14% (w/v) PEG 4000, 20mM Tris/HCl pH 7.5, 150mM NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 291K, pH 7.50
|
Resolution 1.20 Å R-free 0.149 |
| 3D18 Crystal structure of HLA-B*2709 complexed with a variant of the latent membrane protein 2 peptide (LMP2(L)) of epstein-barr virus Deposited 2008-05-05 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：Extracelluar domain, residues 25-300
|
Not recorded | GOL GLYCEROL × 6 TRS 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL × 1 MES 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 1 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 6；291 K；20% PEG 4000, 0.1M MES, pH 6, VAPOR DIFFUSION, HANGING DROP, temperature 291K
|
Resolution 1.74 Å R-free 0.233 |
| 3HCV Crystal structure of HLA-B*2709 complexed with the double citrullinated vasoactive intestinal peptide type 1 receptor (VIPR) peptide (residues 400-408) Deposited 2009-05-06 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：EXTRACELLUAR DOMAIN, RESIDUES 25-300
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；0.1M TRIS HCL,25% PEG 8000, , pH 8.000000, VAPOR DIFFUSION, HANGING DROP, temperature 291K
|
Resolution 1.95 Å R-free 0.245 |
| 3LV3 Crystal structure of HLA-B*2705 complexed with a peptide derived from the human voltage-dependent calcium channel alpha1 subunit (residues 513-521) Deposited 2010-02-19 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：EXTRACELLULAR DOMAIN, UNP residues 25-300
|
Not recorded | GOL GLYCEROL × 3 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 7；291 K；20%(w/v) PEG 8000, 150mM NaCl, 20mM Tris-HCl, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K
|
Resolution 1.94 Å R-free 0.224 |
| 4G8G Crystal Structure of C12C TCR-HA B2705-KK10 Deposited 2012-07-23 | Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：UNP residues 25-300
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；16% PEG 8000 and 0.1M MES pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K
|
Resolution 2.40 Å R-free 0.257 |
| 4G8I Crystal Structure of HLA B2705-KK10-L6M Deposited 2012-07-23 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：UNP residues 25-300
|
Not recorded | TRS 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL × 1 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；298 K；24% PEG 3350 and 0.3M Na2SO4, pH 8, vapor diffusion, hanging drop, temperature 298K
|
Resolution 1.60 Å R-free 0.225 |
| 4G9D Crystal Structure of HLA B2705-KK10 Deposited 2012-07-23 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：UNP residues 25-300
|
Not recorded | GOL GLYCEROL × 1 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；298 K；24% PEG 3350 and 0.3M Na2SO4, pH 8, vapor diffusion, hanging drop, temperature 298K
|
Resolution 1.60 Å R-free 0.233 |
| 4G9F Crystal Structure of C12C TCR-HLAB2705-KK10-L6M Deposited 2012-07-23 | Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count |
Chain A
25–300（276 aa）
Fragment：UNP residues 25-300
|
Not recorded | SO4 SULFATE ION × 3 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；16% PEG 8000 and 0.1M MES, pH 7, vapor diffusion, hanging drop, temperature 298K
|
Resolution 1.90 Å R-free 0.238 |
| 5IB1 Crystal structure of HLA-B*27:05 complexed with the self-peptide pVIPR measured at 295 K Deposited 2016-02-22 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；0.1 M Tris HCl, 16% (w/v) PEG 8000
|
Resolution 1.91 Å R-free 0.192 |
| 5IB2 Crystal structure of HLA-B*27:05 complexed with the self-peptide pVIPR Deposited 2016-02-22 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | GOL GLYCEROL × 4 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；291 K
|
Resolution 1.44 Å R-free 0.161 |
| 5IB3 Crystal structure of HLA-B*27:05 complexed with the self-peptide pVIPR and Copper Deposited 2016-02-22 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | CU COPPER (II) ION × 2 GOL GLYCEROL × 2 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；0.1 M Tris HCl, 16% (w/v) PEG 8000
|
Resolution 1.91 Å R-free 0.204 |
| 5IB4 Crystal structure of HLA-B*27:05 complexed with the self-peptide pVIPR and Nickel Deposited 2016-02-22 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | NI NICKEL (II) ION × 2 GOL GLYCEROL × 2 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；0.1 M Tris HCl, 16% (w/v) PEG 8000
|
Resolution 1.95 Å R-free 0.202 |
| 5IB5 Crystal structure of HLA-B*27:09 complexed with the self-peptide pVIPR and Copper Deposited 2016-02-22 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | CU COPPER (II) ION × 3 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；0.1 M Tris HCl, 16% (w/v) PEG 8000
|
Resolution 2.49 Å R-free 0.272 |
| 5IB5 Crystal structure of HLA-B*27:09 complexed with the self-peptide pVIPR and Copper Deposited 2016-02-22 | Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain D
25–300（276 aa）
|
Not recorded | CU COPPER (II) ION × 3 GOL GLYCEROL × 1 CL CHLORIDE ION × 1 | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；0.1 M Tris HCl, 16% (w/v) PEG 8000
|
Resolution 2.49 Å R-free 0.272 |
| 6PYJ Crystal Structure of HLA-B*2705 in complex with LRN, a self-peptide Deposited 2019-07-30 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 5.6；277 K；20-30% PEG 4K, 0.2M Na Acetate and 0.1M Na Citrate pH 5.6
|
Resolution 1.44 Å R-free 0.220 |
| 6PYL Crystal Structure of HLA-B*2703 in complex with KK10, an HIV peptide Deposited 2019-07-30 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | MG MAGNESIUM ION × 1 | X-RAY DIFFRACTION |
X-ray crystallization conditions
EVAPORATION；277 K；20-30% PEG 4K, 0.2M Na Acetate and 0.1M Na Citrate pH 5.6
|
Resolution 1.52 Å R-free 0.230 |
| 6PYV Crystal Structure of HLA-B*2703-P47G in complex with LRN, a self-peptide Deposited 2019-07-31 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Mutation：P47G | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 5.6；277 K；20-30% PEG 4K, 0.2M Na Acetate and 0.1M Na Citrate pH 5.6
|
Resolution 1.45 Å R-free 0.231 |
| 6PYW Crystal Structure of HLA-B*2705-W60A in complex with LRN, a self-peptide Deposited 2019-07-31 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Mutation：W60A | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 5.6；277 K；20-30% PEG 4K, 0.2M Na Acetate and 0.1M Na Citrate pH 5.6
|
Resolution 1.38 Å R-free 0.220 |
| 6PZ5 Crystal Structure of HLA-B*2703 in complex with LRN, a self-peptide Deposited 2019-07-31 | Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count |
Chain A
25–300（276 aa）
|
Not recorded | No recorded non-water small molecule | X-RAY DIFFRACTION |
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP；pH 5.6；277 K；20-30% PEG 4K, 0.2M Na Acetate and 0.1M Na Citrate pH 5.6
|
Resolution 1.53 Å R-free 0.223 |