Genome structures of the bovine ZNF280BY. Schematic representation of the three major genomic structures of ZNF280BY, denoted as type A, B and C. Type A is the normal form with an estimated 113 copies on BTAY. Type B is resulted from a 13 bp insertion while Type C resulted from an 8 bp deletion in the coding region. The coding segments (CDS) are shaded in black. The number denotes the length of exons, introns and CDS in bp. The non-homologous exon 1 of ZNF280BY type C is shaded in grey. The polyA [(A)n] sites are indicated.