1NS6

The 2.1A Structure of Horse (alpha hemichrome/beta met) Hemoglobin at pH 5.4

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	5.4	298	1.5M ammonium sulfate, 0.35M ammonium phosphate then soaked to pH 5.4 in solutions of 3.35 M ammonium sulfate buffered with 0.2M ammonium phosphate, VAPOR DIFFUSION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.76	55.1

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 108.11	α = 90
b = 63.33	β = 84.72
c = 53.85	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	AREA DETECTOR	UCSD MARK II		1997-09-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	2.04	30	97.2	0.053				21884		2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB entry 1G0B	2.05	54.23	2	21824	2160	95.46	0.189	0.16262	0.16262	0.188	random	18.383

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
0.02		0.04	0.08		-0.1

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	15.069
r_scangle_it	4.499
r_dihedral_angle_1_deg	3.282
r_scbond_it	2.613
r_mcangle_it	1.599
r_angle_refined_deg	1.244
r_mcbond_it	0.778
r_angle_other_deg	0.732
r_symmetry_vdw_refined	0.275
r_nbd_refined	0.228
r_nbd_other	0.187
r_xyhbond_nbd_refined	0.168
r_symmetry_vdw_other	0.135
r_symmetry_hbond_refined	0.1
r_chiral_restr	0.076
r_bond_refined_d	0.015
r_gen_planes_refined	0.005
r_gen_planes_other	0.003
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2203
Nucleic Acid Atoms
Solvent Atoms	84
Heterogen Atoms	86

Software

Software
Software Name	Purpose
REFMAC	refinement
SDMS	data reduction
CNS	refinement
SDMS	data collection
SDMS	data scaling
CNS	phasing