In article <kohlstaedt.1128842726C at ucsbuxb.ucsb.edu> kohlstaedt at sbmm1.ucsb.edu (Lori Kohlstaedt) writes: >How about "Principles of Protein X ray crystallography" by Jan Drenth. I would like to second this opinion. This seems an excellent text. Charles Lesburg lesburg at anchor.chem.upenn.edu