The complete coding sequence of arg defines the Abelson subfamily of cytoplasmic tyrosine kinases.

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Abstract
We have previously described partial genomic sequences of arg, a human gene related to c-abl, and shown that it is expressed as a 12-kilobase transcript and is located at chromosome position 1q24-25. In this study we elucidate the complete coding sequence of arg by characterization of cDNA clones. Analysis of the predicted amino acid sequence of arg revealed that it is indeed closely related to that of c-abl. The two proteins are strikingly similar with regard to overall structural architecture as well as the amino acid sequences of their tyrosine kinase and src homologous 2 and 3 domains. In addition, arg, like c-abl, is expressed as two transcripts that result from a process of alternative splicing and encode alternative protein forms that differ only in their amino termini. The two genes define the Abelson subfamily of cytoplasmic tyrosine kinases and share a common homolog in Drosophila.