Given the task definition and input, reply with output. 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.

The herpesvirus entry mediator C ( HveC ) , previously known as poliovirus receptor - related protein 1 ( PRR1 ) , and the herpesvirus Ig - like receptor ( HIgR ) are the bona fide receptors employed by herpes simplex virus - 1 and - 2 ( HSV - 1 and - 2 ) for entry into the human cell lines most frequently used in HSV studies .
poliovirus receptor