This spontaneous 6 bp deletion of TTTCTG in exon 13 of NM009677, isoform 1, and exon 12 of Nm002301211, isoform 2, is predicted to cause an in-frame deletion of F391 and L392 of isoform 1, or F388 and L389 of isoform 2, amino acids which are in the adaptin N-terminal homology domain involved in interactions with other subunitos of the AP-1 complex.