TASK DEFINITION: In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
PROBLEM: MHC tetramers , which constitute a labeled MHC - peptide ligand suitable for binding to the Ag - specific receptor on T cells , provide a novel approach for the detection and characterization of such rare cells .

SOLUTION: MHC tetramers

PROBLEM: NFAT expression was determined by using immunoprecipitation and Western blot analysis , DNA - binding assays , and RT - PCR analysis of eosinophil mRNA .

SOLUTION: eosinophil mRNA

PROBLEM: Using this inducible Nef , we also compared the specific requirements for CD4 and HLA - A2 downmodulation in a SupT1 T - cell line .

SOLUTION:
HLA - A2