Chromosomal localization of two genes encoding human ras exchange factors: SOS1 maps to the 2p22→p16 region and SOS2 to the 14q21→q22 region of the human genome

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Abstract
The human SOS1 and SOS2 genes encode proteins that control GDP→GTP exchange on ras proteins and are involved in signal transduction by tyrosine kinase receptors. In situ hybridization shows that SOS1 maps to 2p22→p16 and SOS2 to 14q21→q22 in the human genome.