TASK DEFINITION: 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.
PROBLEM: An investigation of the absolute configuration of the potent histamine H3 receptor antagonist GT-2331 using vibrational circular dichroism.

SOLUTION: histamine H3 receptor

PROBLEM: Aminopropylindenes derived from Grundmann's ketone as a novel chemotype of oxidosqualene cyclase inhibitors.

SOLUTION: oxidosqualene cyclase

PROBLEM: Roles played by lymphocyte function-associated antigen-1 in the regulation of lymphocytic cholinergic activity.

SOLUTION:
lymphocyte function-associated antigen-1