              The maximum amplitide of puckering. It is derived from the\
               the pseudorotation value, P, and the torsion angles in the ribose\
               ring.\
\
               Tau2= Taum cosP\
               Tau3= Taum cos(P+144)\
               Tau4= Taum cos(P+288)\
               Tau0= Taum cos(P+ 72)\
               Tau1= Taum cos(P+216)