Steve looked a bit mystified at what scraping his cheek was supposed to do, but he didn't see the harm in it. He had always been told that it was his blood that contained the serum now, so that was what he had to keep safe from people who wanted to recreate it in a dangerous manner.

He nodded and obediently opened his mouth to let Mohinder draw the cotton swab on the inside of his cheek.

Bruce moved a little closer to Tony Stark. He was smaller in person than Bruce had imagined, given the intel they had on him and the work he did with weapons for HYDRA, but no less arrogant in his bearing. He smiled, short and quick. "We're going to have to ask you to leave your suit here, it's possible that its electronic signal could be traced."