The function of GJA10 (gap junction protein alpha 10, Ensembl gene identifier ENSG00000135355) is as follows. One gap junction consists of a cluster of closely packed pairs of transmembrane channels, the connexons, through which materials of low MW diffuse from one cell to a neighboring cell. Involved in tracer coupling between horizontal cells of the retina. May play a role in the regulation of horizontal cell patterning (By similarity). .