108153-74-8 Human secretin L-Valinamide, L-histidyl-L-seryl-L-.alpha.-aspartylglycyl-L-threonyl-L-phenylalanyl-L-threonyl-L-seryl-L-.alpha.-glutamyl-L-leucyl-L-seryl-L-arginyl-L-leucyl-L-arginyl-L-.alpha.-glutamylglycyl-L-alanyl-L-arginyl-L-leucyl-L-glutaminyl-L-arginyl-L-leucyl-L-leucyl-L-glutaminylglycyl-L-leucyl- RG 1068 Secretin Secretin (human) Secretin (pig), 15-L-glutamic acid-16-glycine-