A phylogenetic tree was constructed and analyzed based on the deduced amino acid sequence of LPL from six species. The genetic distance among these six species was determined using the neighbor-joining (NJ) method [19]. A comparison of the distance among these six species revealed that LPL from goat and sheep grouped into one cluster with another moderately related cluster grouping bovine and swine, suggesting that LPL is more conserved between goat and sheep compared with the other four species. The most distant cluster from goat and sheep was that of human and rat. The distances among various species further verified the evolutionary relationship of these proteins (Figure 1). In addition, the order of branching for mammals represented in the LPL phylogeny is in accordance with the previous results suggested by Li et al. [20], in which rodents were one of the earliest groups to separate off from other mammals.