Rs28931614

rs28931614, also known as G380R, Gly380Arg, and c.1138G>A, is a SNP in the fibroblast growth factor receptor 3 FGFR3 gene on chromosome 4. As an autosomal dominant mutation, the rs28931614(A) allele causes achondroplasia, a form of dwarfism.

A more rare change at this SNP, c.1138G>C (rather than G>A), also leads to achondroplasia; it is referred to as i6010295 by 23andMe.