passages.id: split_7_validation_491_passage
passages.type: progene_text
passages.text: KIR1D appears functionally homologous to the rhesus monkey KIR1D and likely arose as a consequence of a 22 nucleotide deletion in the coding sequence of 2DS4 , leading to disruption of Ig - domain 2D and a premature termination codon following the first amino acid in the putative transmembrane domain .