ODM2 Variable Name Controlled Vocabulary ODM2 Working Group A vocabulary for describing the name of Variables. Xylosidase An enzyme with system name 4-beta-D-xylan xylohydrolase.[1][2] This enzyme catalyses the following chemical reaction: Hydrolysis of (1->4)-beta-D-xylans, to remove successive D-xylose residues from the non-reducing termini. Chemistry Wikipedia https://en.wikipedia.org/wiki/Xylan_1,4-b-xylosidase