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:  In 6 cases only there was a strong infiltration of mononuclear cells positive for acid phosphatase .

SOLUTION: acid phosphatase

PROBLEM:  Thus , the behavior of ZEBRA in human B cells and S . cerevisiae suggests that the protein contains universal activation motifs that interact with conserved components of the transcription machinery .

SOLUTION: universal activation motifs

PROBLEM:  Two Tax mutants differentially activated expression of these two elements .

SOLUTION:
Tax mutants