Glycosyl hydrolases from hyperthermophiles are, thus far, the most wid
ely studied enzyme class from these organisms. Not only are there many
biotechnological opportunities for these enzymes, but the rapidly inc
reasing amount of information about their genetic, biochemical and bio
physical characteristics (recently genomic sequencing data for both P.
furiosus and P. horikoshi have been published on the Internet) make t
hem ideal candidates for the study of biocatalysis and protein thermos
tability at extremely high temperatures.