Munich Information Center for Protein Sequences of the German National Research Center for Environment and Health, Am Klopferspitz 18a, 82152 Martinsried, Germany. frishman@mips.biochem.mpg.de|Munich Information Center for Protein Sequences of the German National Research Center for Environment and Health, Am Klopferspitz 18a, 82152 Martinsried, Germany. frishman@mips.biochem.mpg.de|Munich Information Center for Protein Sequences of the German National Research Center for Environment and Health, Am Klopferspitz 18a, 82152 Martinsried, Germany. frishman@mips.biochem.mpg.de|Munich Information Center for Protein Sequences of the German National Research Center for Environment and Health, Am Klopferspitz 18a, 82152 Martinsried, Germany. frishman@mips.biochem.mpg.de