Caenorhabditis elegans	gene rib-2	488951	
Drosophila melanogaster	enzyme botv, homologue of mammalian EXTL3	661562	
Drosophila melanogaster	gene DEXT3	488961	
Homo sapiens	-	758808, 758941	
Homo sapiens	genes EXTL1 and EXTL3	488960	
Homo sapiens	recombinant enzyme lacking first N-terminal 57 amino acids to give a soluble protein, expression in malignant fibrous histocytoma cell line	662102	
Homo sapiens	recombinant enzymes EXT1 and EXT2, activity is only detectable when enzymes are coexpressed, a mixture of individually expressed enzymes is inactive	662163	
Mus musculus	-	758855	
Xenopus laevis	-	686299