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Updated: Jun 23, 2026

An Integrated Approach for Microprotein Identification and Sequence Analysis
Published on: July 12, 2022
Characterization of shark complement factor I gene(s): genomic analysis of a novel shark-specific sequence
Dong-Ho Shin1, Barbara M Webb, Miki Nakao
1Department of Biological Sciences, Florida International University, Miami, FL 33199, USA.
Abstract:
Complement factor I is a crucial regulator of mammalian complement activity. Very little is known of complement regulators in non-mammalian species. We isolated and sequenced four highly similar complement factor I cDNAs from the liver of the nurse shark (Ginglymostoma cirratum), designated as GcIf-1, GcIf-2, GcIf-3 and GcIf-4 (previously referred to as nsFI-a, -b, -c and -d) which encode 689, 673, 673 and 657 amino acid residues, respectively. They share 95% (
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