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]: Defective processing of the transforming growth factor-beta1 in azoxymethane-induced mouse colon tumors.
[EX A]: transforming growth factor-beta1

[EX Q]: RDH12, a retinol dehydrogenase causing Leber's congenital amaurosis, is also involved in steroid metabolism.
[EX A]: retinol dehydrogenase

[EX Q]: Cembranoid and long-chain alkanol sites on the nicotinic acetylcholine receptor and their allosteric interaction.
[EX A]:
nicotinic acetylcholine receptor