Thanks this must be a fix. I tried once but the loading file within the
window did not give an option of .ciff (only for restraints). I will
try again.
On 07/24/2017 05:24 PM, Pavel Afonine wrote:
Hi Lijun,
it's not a problem if you use mmCIF or PDB with two-letter chain ID
(both supported in Phenix).
Pavel
On Mon, Jul 24, 2017 at 5:09 PM, Lijun Liu <lijunli...@gmail.com
<mailto:lijunli...@gmail.com>> wrote:
Hi: this must be an old problem but I would like to know if there
are other ideas to make things easier.
I solved a structure that contains 240 helices of identical
sequences in the asymmetric unit. Handling so many chains is
really a headache as pdb contains only a single column for chain
ID (currently support up to 61 chains). I had to combine some
(say a tetramer) as a single chain for a trick, which made me use
just enough letters/numbers (A-Z,1-9,a-z). However this will need
further manual dealing with OXTs (currently I cheat with single N
of a residue) and raise new problems (like restraints). Some
softwares does even not recognize chain IDs like a-z. SegID might
be another trick however nowadays many softwares won't take that
part, so a down-to-chain rigid body / TLS refinement could be
impossible, without the combination trick.
With tricks I am ok to make things going? But is there a solution
really solve the many-chain problem with PDB?
Best,
Lijun
Sent from my iPhone
