Purified recombinant BG1 of Arabidopsis thaliana, residues 27-528 with a His6-thioredoxin tagged, UniProt: Q9SE50, TAIR: At1g52400
BG1 (Beta-glucosidase 1) hydrolyzes abscisic acid glucose ester (ABA-GE) which represents the predominant form of conjugated ABA (biologically inactive). No activity with beta-D-glucopyranosyl zeatin. The hydrolysis of ABA-GE in the endoplasmic reticulum