11480
CTLs from BALB/c mice inoculated i.p. with wild-type Ad recognized E1B in the context of the major histocompatibility complex ( MHC ) class I Dd allele and a region outside E1 associated with the Kd allele .
 major histocompatibility complex, E1, E1B, Kd allele, MHC, major histocompatibility complex ( MHC ) class I Dd allele, CTLs
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 major histocompatibility complex, E1, E1B, Kd allele, MHC, major histocompatibility complex ( MHC ) class I Dd allele, CTLs