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pbx1a and pbx1b isoforms are differentially expressed in pancreatic islets and acinar cells. A Western blot assay of whole-cell extracts from freshly isolated islets (ISLET), whole pancreas (PANC.), and the acinar cell line 266-6 was done with α pbx-1-specific antiserum. The migration of in vitro-translated pbx1a polypeptide is shown. The relative positions of pbx1b and pbx1a polypeptides are indicated.
