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: Receptor cleavage by these and other endogenous enzymes may account for previous observations of ' ' abnormal ' ' receptors in cytosols from some leukemic specimens .

Output: endogenous enzymes

Input: Consider Input: A clinically acceptable synthetic derivative of MDP , namely murabutide ( MB ) , has been found to present interesting pharmacological properties and to suppress HIV - 1 replication in monocyte - derived macrophages ( MDM ) .

Output: HIV - 1

Input: Consider Input: Exposure of HUVECs to B . fragilis outer membrane fractions , separated from other components of the B . fragilis cell wall by isopycnic , sucrose gradient centrifugation , significantly increased surface expression of E - selectin and induced functional endothelial cell - dependent leukocyte adhesion .
Output: E - selectin