CCL21 and deafness: SLC16A6 and ARSG, which are located in the same locus overlapping each other and were both replicated under the additive model, display a downward slope for the homozygous BB genotype very similar to that shown by DCLK1. SLC16A6 belongs to the solute carrier (Slc) family, whose members have already been associated with different forms of deafness [19], and ARSG is involved in hormone biosynthesis, modulation of cell signaling, and degradation of macromolecules.