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Ufd2a is a ubiquitylation enzyme that is involved in protein degradation, cell division, and apoptosis signaling. Data has shown that cardiac and skeletal muscle cells of adult rodents and humans express alternatively spliced isoforms of Ufd2a. Ufd2a I (exons 1-6, 8-27) has been found to be expressed in murine myoblasts, but, upon differentiation, myotubes began to express Ufd2a II (includes exon 7), followed by Ufd2a III (includes exon 7a). Since zebrafish are an ideal in vivo model organism, this study examines the spatial-temporal expression patterning of Ufd2a and its isoforms in zebrafish embyros during development.

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