Could you help us for the purification of a lipoglycoproteic exotoxin (250 Kd) from a medium cultur. Thank's by advance -- Michael HERMAN Laboratory of Cellular Biochemistry, Facultes Universitaires ND de la Paix, 61, rue de Bruxelles, B-5000 Namur (Belgium). Fax: ++/32/81/72.41.35. Email: michet at biocell.fundp.ac.be