Here's a Flash game about gene sequencing from the UK which is surprisingly fun to play. The controls took me a couple of games to get used to, then I caught on to it quickly. It's all about constructing genes by piecing amino acids together in the proper sequence. A very odd premise on which to build a game, but it works quite well actually. Be sure to press the [M] key to mute the music, as it gets a bit repetitious.