L-methionyl-L-alanine: a dipeptide with hexagonal symmetry and Z' = 7.
The crystal structure of L-methionyl-L-alanine, C(8)H(16)N(2)O(3)S, is very similar to that of L-valyl-L-alanine [Görbitz & Gundersen (1996). Acta Cryst. C52, 1764-1767] and other related dipeptides in space group P6(1), but there are seven molecules in the asymmetric unit. The Z value of 42 is the highest ever observed for a chiral molecule.
Görbitz
Carl Henrik
CH
Department of Chemistry, University of Oslo, PO Box 1033, Blindern, N-0315 Oslo, Norway. c.h.gorbitz@kjemi.uio.no
D000409:Alanine / Q000737:chemistry*; D003460:Crystallization; D018360:Crystallography, X-Ray; D004151:Dipeptides / Q000737:chemistry*; D006860:Hydrogen Bonding; D008715:Methionine / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D011487:Protein Conformation
D004151:Dipeptides; D008715:Methionine; D000409:Alanine