2336
Allelic variation in HLA - B and HLA - C sequences and the evolution of the HLA - B alleles .
 HLA - B, HLA - C sequences, HLA - B alleles
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 HLA - B, HLA - C sequences, HLA - B alleles