Doug Stryke, Michiko Kawamoto, Conrad C. Huang, Susan J. Johns, Leslie A. King, Courtney A. Harper, Elaine C. Meng, Roy E. Lee, Alice Yee, Larry L'Italien, Pao-Tien Chuang, Stephen G. Young, William C. Skarnes, Patricia C. Babbitt, Thomas E. Ferrin
Nucleic Acids Res. 2003 Jan 1; 31(1): 278–281. doi: 10.1093/nar/gkg064