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: These results provide strong evidence that conserved interhelical packing interactions in the gp41 core are important determinants of HIV - 1 entry and its inhibition .

SOLUTION: gp41 core

PROBLEM: Inhibition of DNA topoisomerase II alpha gene expression by the p53 tumor suppressor .

SOLUTION: p53 tumor suppressor

PROBLEM: Finally , the conservation of the two residues most sensitive to mutations ( Y949 and Y953 ) in TM11 , and in the homologous TM5 , of all mammalian P - gps and also in other ABC transporters , suggests that these residues and domains may play an important role in structural as well as mechanistic aspects common to this family of proteins .

SOLUTION:
ABC transporters