Phylogenetic tree of GnTI amino acid sequences from different species. Amino acid sequences were aligned using the COBALT constraint-based multiple alignment program. GnTI: Homo sapiens (AAH03575.1), Macaca mulatta (NP_001244759.1), Mus musculus (NP_001103620.1), Rattus norvegicus (AAH74010.1), Bos taurus (AAI51368.1), Danio rerio (NP_956970.1), Caenorhabditis elegans (AAD03022.1), Drosophila melanogaster (NP_525117.2), Arabidopsis thaliana (NP_849517.1), Oryza sativa (BAD28450.1). The length of the horizontal lines represents the evolutionary distance.