Down-Regulation of Melanocortin Receptor Signaling Mediated by the Amino Terminus of Agouti Protein in Xenopus Melanophores

    Michael M. Ollmann, Gregory S. Barsh
    Studysummary This study found that full-length Agouti protein modulates melanocortin receptor signaling through a dual mechanism involving competitive antagonism and receptor down-regulation, whereas the carboxyl-terminal fragment acts solely as a competitive antagonist.
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