An alternative sample that may be appropriate for the same instructional purposes as gramacidin S is a small tripeptide prolyl-leucyl-glycinamide, which happens to be the C-terminal tripeptide from the hormone oxytocin. It is available from Sigma at $57/gm (cat # P-9887).
David Live
Complex Carbohydrate Research Center
University of Georgia
315 Riverbend Rd.
Athens, GA 30602
Phone: 706-542-6262
Received on Wed Mar 14 2007 - 08:02:23 MST