. 2003 Feb 3;4(2):R11. doi: 10.1186/gb-2003-4-2-r11
Copyright © 2003 Anantharaman and Aravind; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original URL.