Starratt AN, Brown BE (1975). "Structure of the pentapeptide proctolin, a proposed neurotransmitter in insects". Life Sci. 17 (8): 1253–6. doi:10.1016/0024-3205(75)90134-4. PMID576.
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pubmed.ncbi.nlm.nih.gov
Starratt AN, Brown BE (1975). "Structure of the pentapeptide proctolin, a proposed neurotransmitter in insects". Life Sci. 17 (8): 1253–6. doi:10.1016/0024-3205(75)90134-4. PMID576.