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  • Title: A neuropeptide precursor expressed in Aplysia neuron L5.
    Author: Shyamala M, Fisher JM, Scheller RH.
    Journal: DNA; 1986 Jun; 5(3):203-8. PubMed ID: 3013547.
    Abstract:
    Aplysia abdominal ganglion neuron L5 is immunoreactive with an antiserum generated against the tetrapeptide Phe-Met-Arg-Phe-amide (FMRFamide); however, the specificity of this immune reagent is limited to the sequence Arg-Phe-amide. We isolated cDNA clones homologous to mRNAs specifically expressed in L5 and demonstrated that these clones do not hybridize to a previously characterized gene encoding FMRFamide. The nucleotide sequence of one of these clones, L5-67, does not encode any FMRFamide peptides but does reveal a Gly-Lys-Arg cleavage site following the amino acids Arg-Phe. This data predicts that neuron L5 expresses a peptide ending in Arg-Phe-amide, consistent with the FMRFamide immunoreactivity.
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