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.

Example Input: The dextromethorphan analog dimemorfan attenuates kainate-induced seizures via sigma1 receptor activation: comparison with the effects of dextromethorphan.
Example Output: sigma1 receptor

Example Input: Transgenic expression of the human Vitamin D receptor (hVDR) in the duodenum of VDR-null mice attenuates the age-dependent decline in calcium absorption.
Example Output: human Vitamin D receptor

Example Input: Cooperative effects for CYP2E1 differ between styrene and its metabolites.
Example Output:
CYP2E1