Rigorous quality control steps, termed checkpoints, tightly regulate progression through the cell cycle. DNA-damaging chemotherapy and radiation activate functional cellular checkpoints. These ...

3D rendering of a checkpoint inhibitor binding PD-1, a protein on the surface of an immune T cell. This article is part of an ongoing series on checkpoint inhibitors, a novel cancer immunotherapy.

"The checkpoint will focus on removing impaired drivers, as well as unlicensed drivers from the roadways," a news release said.

Myrtle Beach drivers could encounter police stopping cars this Friday night. Here’s where the checkpoint is planned.

Modesto police will conduct a DUI checkpoint Friday night at an undisclosed location in the city, according to a department ...

DENVER (KDVR) — At 3 a.m. on Tuesday, Aug. 5, a new security checkpoint will open for business at Denver International Airport, along with the walkway to Concourse A. With the new checkpoint opening, ...