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 contrast , postmitotic neurons possessed extremely low levels of E2F1 protein as assessed by the electrophoretic mobility shift assay and Western blotting .

SOLUTION: E2F1 protein

PROBLEM:  Furthermore , Grap is associated with a Ras guanine nucleotide exchange factor mSos1 , primarily through its N - terminal SH3 domain .

SOLUTION: SH3 domain

PROBLEM:  Chromaffin cells transfected with a plasmid with the entire coding sequence of c - Rabphilin3a inserted in the antisense orientation inhibited secretion of co - expressed GH by approximately 30 % .

SOLUTION:
c - Rabphilin3a