682
Substitution of the DR1 beta chain with H - 2E beta k led to a dramatic loss of recognition ; alpha chain substitution had a less marked effect .
 GENE: DR1 beta chain; GENE: H - 2E beta k
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: DR1 beta chain, H - 2E beta k 
Answer:
 GENE: DR1 beta chain; GENE: H - 2E beta k