Sequence: YQPPSTNKNTKSQRRKGSTFEERK, 24 residues, free acid, as registered with FDA GSRS. A variant ending EEHK is common in the literature, and research-grade material is often supplied amidated with D-arginine at 14 and 15.
Other names: IGF-1Ec E-domain 24-mer
State the exact variant on your order. The registered sequence, the EEHK variant and the stabilized amidated form have different masses.