STAMBP and melanoma: The Nle4-D-Phe7-α-MSH octapeptide variants such as MSHoct (βA3-Nle4-D5-H6-f7-R8-W9-K10 -NH2), NAPamide (Nle4-D5-H6-f7-R8-W9-G10-K11-NH2), and unmodified α-MSH (Ac-S1 -Y2 -S3 -M4 -E5 -H6 -F7 -R8 -W9 -G10 K11 -P12 -V13) conjugated to DOTA chelator and radiolabeled with 67/68Ga or 111In have been evaluated for the PET imaging of melanoma (B16F1) bearing mice.