instruction:
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.
question:
Human and murine cytotoxic T lymphocyte serine proteases : subsite mapping with peptide thioester substrates and inhibition of enzyme activity and cytolysis by isocoumarins .
answer:
serine proteases

question:
This ligand - independent pathway can function through another androgen - regulated promoter as shown by the use of the mouse mammary tumor virus MMTV - CAT reporter .
answer:
CAT reporter

question:
A survey of children with HBsAg markers related to their parents HBV markers .
answer:
HBsAg markers