4679
Subjects carrying the UGT2B7 268 His / Tyr or Tyr / Tyr genotype had significantly lower total NNAL than those carrying His / His genotype .
 Chemical: His; Chemical: Tyr; Chemical: Tyr; Chemical: Tyr; Chemical: NNAL; Chemical: His; Chemical: His
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: His; Chemical: Tyr; Chemical: Tyr; Chemical: Tyr; Chemical: NNAL; Chemical: His; Chemical: His