What is "adp-ribosylglycohydrolase"

In molecular biology, ADP-ribosylglycohydrolase is a family of enzymes which catalyses ADP-ribosylations. This family includes enzymes such as ADP-ribosylarginine hydrolase ( which cleaves ADP-ribose-L-arginine. The family also includes dinitrogenase reductase activating glycohydrolase, and most surprisingly jellyfish crystallins, although these proteins appear to have lost the presumed active site residues.