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: Expression and 1,4-dihydropyridine-binding properties of brain L-type calcium channel isoforms.

Output: L-type calcium channel


Input: Consider Input: Molecular recognition of histidine tRNA by histidyl-tRNA synthetase from hyperthermophilic archaeon, Aeropyrum pernix K1.

Output: histidyl-tRNA synthetase


Input: Consider Input: Angiotensin AT1 receptor antagonist losartan and the defence reaction in the anaesthetised rat. Effect on the carotid chemoreflex.


Output: AT1 receptor