Dang, I submitted this in the past but I think it died.

Yeah, I hate when that happens.

That's damned amazing. Knowing how it works on paper, and seeing it are two vastly different things. I'd like to see a video for how RNA interference works.

these are great. i wish he'd make a messy version, too, with a slightly more realistic amount of other molecules bouncing around... just so it doesn't look like these things are magically directed to the site they're needed (proteins that attach with and around histones for the first one, accessory proteins in the replication fork, and of course the A,C,G,T's that are coming out of nowhere in the replication fork).