Abstract
: Single complementary DNAs encoding sequences for 40S ribosomal proteins related to S27E from the American lobster Homarus americanus and mussel Mytilus galloprovincialis were characterized. Single genes for ribosomal proteins L37A and P2 from the gumboot chiton Cryptochiton stellerii are similarly described. The lobster S27E protein contains the highly conserved cysteine residues, suggesting its likely designation in the C4 protein family containing zinc finger motifs. The lobster S27E protein also appears to have an intermediate gene copy number between lower and higher euckaryotes. Expression of the S27E protein in lobster hepatopancreas was slightly elevated during several postmolt and premolt stages. Chlorinated pesticide treatment significantly reduced S27E expression in hepatopancreas, indicating that this gene is responsive to endogenous and exogenous cues.
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