Two variants A and B were identified in the αs1-casein gene as result of the alternative out-splicing of the exon 18. Exon skipping and duplication events were evidenced. The exonic subdivision evidenced a structure made of 21, 9, 17 and 6 exons for the αs1-, β-, αs2- and κ-casein genes respectively. The most represented mRNA populations were those correctly assembled (85.07%) and they encoded for mature proteins of 215, 217, 187 and 162 amino acids respectively for the CSN1S1, CSN2, CSN1S2 and CSN3 genes. A total of 288 casein clones transcripts were analysed from two lactating llamas. In the present paper, we report for the first time the characterization of llama (Lama glama) caseins at transcriptomic and genetic level. Molecular Characterization of the Llamas (Lama glama) Casein Cluster Genes Transcripts ( CSN1S1, CSN2, CSN1S2, CSN3) and Regulatory Regions
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