Vered Kunik Zach Solan Shimon Edelman Eytan Ruppin David Horn Motif Extraction and Protein Classification. 80-85 2005 conf/csb/2005 CSB http://doi.ieeecomputersociety.org/10.1109/CSB.2005.39 db/conf/csb/csb2005.html#KunikSERH05