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We have previously described a mutant B lymphoblastoid cell line , Clone-13, that expresses HLA-DQ in the absence of HLA -DR and -DP .
 ( cell line: mutant B lymphoblastoid cell line, None) , ( cell line: Clone-13,, None) , ( protein: HLA-DQ, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell line: mutant B lymphoblastoid cell line, None) , ( cell line: Clone-13,, None) , ( protein: HLA-DQ, None) 