List of non-centrosymmetric SG's

Harry Powell hrp1000 at
Tue Apr 6 04:01:27 EST 1999

On Fri, 2 Apr 1999, Dominique Vlieghe wrote:

> Hello all,
> I know this might be a question that pops up from time to time in this
> group, but I still want to give it a try:
> Does someone know where i can find a list of all non-centrosymmetric
> space-groups, which are the only ones allowed for protein/DNA
> structures? 

I believe that a complete list is in a couple of the subroutines in the
area detector software 'MOSFLM'. Here's a list taken from the source code 
(sorry for any omissions/errors due to cut&paste...);

aP     'P1',
mP     'P2,P21',
mC     'C2',  
mI     'I2'     
oP     'P222,P2221,P21212,P212121',
oC     'C222,C2221','F222','I222,I212121,',
tetP   'P4,P41,P42,P43,P422,P4212,P4122,P41212,P4222,P42212,P4322,P43212'
tetI   'I4,I41,I422,I4122',
triP   'P3,P31,P32,P312,P321,P3112,P3121,P3212,P3221',
hP     'P6,P61,P65,P62,P64,P63,P622,P6122,P6522,P6222,P6422,P6322'
hR     'R3,R32',
cP     'P23,P213,P432,P4232,P4332,P4132',
cF     'F23,F432,F4132',
cI     'I23,I213,I432,I4132'

Dr Harry Powell, MRC Laboratory of Molecular Biology,
MRC Centre, Hills Road, Cambridge, CB2 2QH

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