Cathy H. Wu Hongzhan Huang Lai-Su L. Yeh Winona C. Barker Protein family classification and functional annotation. 37-47 2003 27 Computational Biology and Chemistry 1 http://dx.doi.org/10.1016/S1476-9271(02)00098-1 db/journals/candc/candc27.html#WuHYB03