Neutrase, co-deposited with sorbitol on to polyamide, synthesised several N-alpha-protected dipeptide derivatives in acetonitrile with a buffer concentration of 4% (v/v). Reaction yields between 95-99% were obtained for all the dipeptides with the exception of Fmoc-Hyp-Leu-NH2 (77%) and Z-Val-Leu-NH2 (9%).