passages.id: split_5_test_3443_passage
passages.type: progene_text
passages.text: HIV - exposed but seronegative female sex workers in Abidjan , CÃ?Â´te d' Ivoire , frequently possessed inhibitory KIR genes in the absence of their cognate HLA genes : KIR2DL2 / KIR2DL3 heterozygosity in the absence of HLA-C1 and KIR3DL1 homozygosity in the absence of HLA-Bw4 .