This family represents the N-terminal domain of the failed axon connections homolog (FAXC). This protein is localised to the cellular membranes, thus it is likely that this region anchors it to the plasma membrane. It is thought to play a role in axonal development, being involved in cell-cell interactions [1].

1: Genetic interactions between the Drosophila Abelson (Abl) tyrosine kinase and failed axon connections (fax), a novel protein in axon bundles. Hill KK, Bedian V, Juang JL, Hoffmann FM; Genetics. 1995;141:595-606. PMID:8647396