Patent ID: 11912791
Assignee: WNTRESEARCH AB
Field: Biotechnology (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A composition comprising a protected peptide selected from
a. PG1-Gly-Cys(PG2)-Glu(OPG3)-Leu-OR1 
b. PG1-Asp(OPG3)-Gly-Cys(PG2)-Glu(OPG3)-Leu-OR1 
c. PG1-Met-Asp(OPG3)-Gly-Cys(PG2)-Glu(OPG3)-Leu-OR1 
d. For-Met-Asp(OPG3)-Gly-Cys(PG2)-Glu(OPG3)-Leu-OR1,
wherein PG1 is selected from H and a base sensitive protecting group, PG2 is selected from H and trityl (Trt), PG3 is selected from H and tert-butyl (tBu), and R1 is chosen from H and C1-C6 alkyl with the proviso that PG1, PG2, PG3 and R1 are not simultaneously hydrogen and
wherein the composition is free of peptides that have an aspartimide moiety.