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.
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Question:  No patient demonstrated a decrease in bone marrow fibrosis as determined by serial procollagen ( PC III ) serum level analysis .

Answer: PC III


Question:  Consistent with this , rh5 expression in R8 disappears when R7 cells are absent ( in sevenless mutant ) .

Answer: sevenless mutant


Question:  When linked to the herpes simplex thymidine kinase minimal promoter , this fragment acts as an enhancing element in Rcho but not GC cells .

Answer:
thymidine kinase