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.

Q:  By computed homology search , we noticed significant similarities between US3 PK and p21 - activated kinase ( PAK ) , which is activated by the Cdc42 or Rac .

A: US3 PK
****
Q:  This results in a decreased secretion of immunoglobulin A , and , consequently , a decreased resistance against infections .

A: immunoglobulin A
****
Q:  [ ( OP ) 2Cu ] + also detected protections in the C alpha - helix , the interdomain hinge , and beta - strands 2 - 7 .

A:
C alpha
****