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Protein Data Bank exchange dictionary (pdbx) version 1.0521
_struct_mon_nucl.P
Name:'_struct_mon_nucl.P'
Definition:
P is the phase angle of pseudorotation for five-membered rings. For ribose and deoxyribose sugars in nucleic acids (tau4 +tau1)-(tau3+tau0) P = ATAN (-------------------------) 2tau2 (sin 36+sin 72) If tau2 is <0, then P=P+180 degree (Altona & Sundaralingam, 1972). Ref: Altona, C. & Sundaralingam, M. (1972). J. Am. Chem. Soc. 94, 8205-8212.
Type: float
Mandatory item: no
Category: struct_mon_nucl