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:  Furthermore , the SH2 domain of p56 ( lck ) appeared to be required for pervanadate - induced NF - kappa B activation but not for Tyr42 phosphorylation .

SOLUTION: SH2 domain

PROBLEM:  These cells were examined for ER mRNA by reverse transcription nested polymerase chain reaction .

SOLUTION: ER mRNA

PROBLEM:  The promoters of the adenovirus 2 major late gene , the mouse beta - globin gene , the mouse immunoglobulin VH gene and the LTR of the human T - lymphotropic retrovirus type I were tested for their transcription activities in cell - free extracts of four cell lines ; HeLa , CESS ( Epstein - Barr virus - transformed human B cell line ) , MT - 1 ( HTLV - I - infected human T cell line without viral protein synthesis ) , and MT - 2 ( HTLV - I - infected human T cell line producing viral proteins ) .

SOLUTION:
viral proteins