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.

Input: Consider Input: Adipose tissue as a source of nicotinamide N-methyltransferase and homocysteine.

Output: nicotinamide N-methyltransferase


Input: Consider Input: Metabolism of triethylenetetramine and 1,12-diamino-3,6,9-triazadodecane by the spermidine/spermine-N(1)-acetyltransferase and thialysine acetyltransferase.

Output: spermidine/spermine-N(1)-acetyltransferase


Input: Consider Input: The antitussive activity of delta-opioid receptor stimulation in guinea pigs.


Output: delta-opioid receptor