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Comparison of the linear schematic organization of LFRFa precursors in mollusks: Ls-LFRF identified in Lymnaea stagnalis (88), Ac-LFRF in Aplysia californica (86), Lg-LFRF in Lottia gigantea (27), Cg-LFRF in Crassostrea gigas (87), and So-LFRF in Sepia officinalis (91). Signal peptides, proteolytic processing sites, and C-terminal glycines for amidation are indicated by distinct labels.
