Experiment: 1FTD

5'-D(CPGPCPGPAPAPTPTPCPGPCPG)-3'-SYMMETRIC BIS-BENZIMIDAZOLE COMPLEX

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.8	284	SODIUM CACODYLATE, MPD, SPERMINE TETRAHYDROCHLORIDE, NACL, MGCL2, pH 6.8, VAPOR DIFFUSION, HANGING DROP, temperature 284K

Crystal Properties
Matthews coefficient	Solvent content
2.16	42.95

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 25.15	α = 90
b = 39.94	β = 90
c = 65.65	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	RIGAKU RAXIS IV++		1999-12-01	M	SINGLE WAVELENGTH

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

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	20	92.9	0.04	27.9	1.1	4891	4427		3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2	2.03			0.1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		2	8	4	4198	4063	448		0.249	0.242	0.244	0.2352	0.292	RANDOM 10%

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]

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms	486
Solvent Atoms	79
Heterogen Atoms	51

Software

Software
Software Name	Purpose
X-PLOR	model building
SHELXL-97	refinement
SCALEPACK	data scaling
X-PLOR	phasing