The UCSC genome browser database: update 2007.

R M Kuhn, D Karolchik, A S Zweig, H Trumbower, D J Thomas, A Thakkapallayil, C W Sugnet, M Stanke, K E Smith, A Siepel, K R Rosenbloom, B Rhead, B J Raney, A Pohl, Jakob Skou Pedersen, F Hsu, A S Hinrichs, R A Harte, M Diekhans, H ClawsonG Bejerano, G P Barber, R Baertsch, D Haussler, W J Kent