Understanding self-rotation function

Steffen Graether steffen at protein.biochem.queensu.ca
Thu Sep 24 15:34:11 EST 1998


Hello,

I am attempting to determine the symmetrical relationships between 
molecules in the assymetric unit of my crystal. I'm using ccp4's polarfn 
(the shell script run is shown below). The output is shown on our webpage 
at crystal.biochem.queensu.ca:/rotation. Can I correctly conclude that I 
have two 2-fold axes of symmetry?

Many thanks,
Steffen

#!/bin/csh -f

polarrfn hklin lowres.mtz  mapout temp.map << EOF
TITLE self rotation
SELF 15.0 2.0 
RESOLUTION  10  3
CRYSTAL FILE 1 BFAC -20 
LABIN FILE 1 F=FLOW SIGF=SIGFLOW
LIMITS 0 180 5 0 180 5 0 180 5 
MAP
FIND  5 100 

EOF

polarrfn hklin lowres.mtz         \
         mapin temp.map   \
         plot 180.plt << EOF 
TITLE self rotation 
SELF 15.0 2.0 
RESOLUTION 10 3
CRYSTAL FILE 1 BFAC -20 
LABIN FILE 1 F=FLOW SIGF=SIGFLOW
LIMITS 0 180 5 0 180 5 0 180 5    

READ 180 180 
PLOT  10 10
EOF

-- 
*************************************************************************
*Steffen Graether	            steffen at crystal.biochem.queensu.ca 	*
*Dept. of Biochemistry							*
*Queen's University, Kingston, Ontario, Canada				*
*Voice (613) 545-6392							*
*Fax   (613) 545-2497							*
*************************************************************************





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