13543
Further analysis based on the case - control study revealed that variant allele ( Cys ) of OGG1 was significantly associated with male infertility risk in a dominant model ( OR = 1 . 35 , 95 % CI : 1 . 01 - 1 . 82 ; trend P < 0 . 001 ) .
 Chemical: Cys
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: Cys