This TALEN mediated 650 bp deletion extending from intron 48â49 to mid-exon 50, deletes 169 amino acids including most of non-collagenous domain 6 through partway into non-collagenous domain 3, and all of the domains between: collagenous 5, non-collagenous 5, collagenous 4, non-collagenous 4, and collagenous 3.