- The major component of the cellulosomes of anaerobic fungi from the genus Piromyces is a family 48 glycoside hydrolase. Steenbakkers, P.J., Freelove, A., Van Cranenbroek, B., Sweegers, B.M., Harhangi, H.R., Vogels, G.D., Hazlewood, G.P., Gilbert, H.J., Op den Camp, H.J. DNA Seq. (2002)