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.

[EX Q]: Enzymatic and biochemical properties of a novel human serine dehydratase isoform.
[EX A]: human serine dehydratase

[EX Q]: Resistance to thyroid hormone due to a novel thyroid hormone receptor mutant in a patient with hypothyroidism secondary to lingual thyroid and functional characterization of the mutant receptor.
[EX A]: thyroid hormone receptor

[EX Q]: Analgesia and COX-2 inhibition.
[EX A]:
COX-2