1130
Gap b3 consists of two polypeptide chains ( Mr = 110 , 000 and 30 , 000 ) , which seem to be proteolytic cleavage products connected by disulfide bonds from a precursor protein .
 Gap b3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Gap b3