Saccharomyces cerevisiae	the enzyme is also present in wild type yeast, although its level is ten to twenty times lower than those found in the mutant	
Saccharomyces cerevisiae 10a12-13	-	
Saccharomyces cerevisiae PM-II	-	
Saccharomyces cerevisiae	-	
Saccharomyces cerevisiae	isoform S288c