836
Mono - ADP - ribosylation is a reversible modification of proteins , with NAD : arginine ADP - ribosyltransferases ( EC 2 . 4 . 2 . 31 ) and ADP - ribosylarginine hydrolases ( EC 3 . 2 . 2 . 19 ) catalyzing the opposing reactions in an ADP - ribosylation cycle .
 GENE: arginine ADP - ribosyltransferases; GENE: EC 2 . 4 . 2 . 31; GENE: ADP - ribosylarginine hydrolases; GENE: EC 3 . 2 . 2 . 19
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: arginine ADP - ribosyltransferases, EC 2 . 4 . 2 . 31, ADP - ribosylarginine hydrolases, EC 3 . 2 . 2 . 19 
Answer:
 GENE: arginine ADP - ribosyltransferases; GENE: EC 2 . 4 . 2 . 31; GENE: ADP - ribosylarginine hydrolases; GENE: EC 3 . 2 . 2 . 19