There was a brief discussion of this on the board last year. See: http://www.dl.ac.uk/list-archive-public/ccp4bb/msg18757.html
Good luck kmj shivesh kumar wrote:
Dear all,Can u suggest me about the peptide crystallization,some references.Should I try it with PEG or MPD.It is 10-15 residues long.Thanx in advance.S...