13842
Transient transfectants of the porcine B-cell line L23 with the mutated CIITA constructs were tested for the suppression of constitutive SLA-DR and SLA-DQ expression .
 protein: CIITA; DNA: CIITA constructs; cell line: porcine B-cell line L23
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: CIITA, CIITA constructs, porcine B-cell line L23 
Answer:
 protein: CIITA; DNA: CIITA constructs; cell line: porcine B-cell line L23