New class of Son-of-sevenless (Sos) alleles highlights the complexities of Sos function.


The guanine nucleotide exchange factor (GEF) Son-of-sevenless (Sos) encodes a complex multidomain protein best known for its role in activating the small GTPase RAS in response to receptor tyrosine kinase (RTK) stimulation. Much less well understood is SOS's role in modulating RAC activity via a separate GEF domain. In the course of a genetic modifier… (More)


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