Phe—Val crosslink in symerythrin

The crystal structure of diiron protein symerythrin from Cyanophora paradoxa reveals a novel C—C cross-link between valine and phenylalanine residues [1].

1. Cooley, R.B., Rhoads, T.W., Arp, D.J. and Karplus, P.A. (2011) A diiron protein autogenerates a valine-phenylalanine cross-link. Science 332, 929.