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: Crystal structure of serine dehydratase from rat liver.

A: serine dehydratase
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Q: Inhibition by pentosan polysulfate (PPS) of heparin-binding growth factors released from tumor cells and blockage by PPS of tumor growth in animals.

A: heparin-binding growth factors
****
Q: The effect of vitamin B6 deficiency on alanine: glyoxylate aminotransferase isoenzymes in rat liver.

A:
alanine: glyoxylate aminotransferase
****