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The exon structure of the mouse Sc1 gene is very similar to the mouse Sparc gene.

Abstract

Sc1 and Sparc are two extracellular proteins sharing similarity in their carboxyl terminus, with 63% identity over a 232-amino-acid region. We have cloned and mapped the genomic locus of mouse Sc1. The mouse Sc1 gene contains 11 exons spanning approximately 35 kb of DNA. The genomic structure (exon/intron boundaries) of Sc1 exons 6 to exon 11 is identical to those of the similar portion of the Sparc gene. This suggests that Sc1 and Sparc originated from a common ancestral gene. Using fluorescence in situ hybridization analysis, Sc1 was localized to band 5E4 of mouse chromosome 5.

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