1754
Accordingly , constitutive downregulation of expression of accessory molecules of the MHC class I pathway can reveal differences between H2 class I alleles in antigen presentation not encountered when the expression levels are augmented .
 GENE: MHC class I pathway; GENE: H2 class I alleles
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: MHC class I pathway; GENE: H2 class I alleles