If protein structure prediction methods are to make any impact on the
impending onerous task of analyzing the large numbers of unknown prote
in sequences generated by the ongoing genome-sequencing projects, it i
s vital that they make the difficult transition from computational 'ge
dankenexperiments' to practical software tools. This has already happe
ned in the field of comparative modelling and is currently happening i
n the threading field. Unfortunately, there is little evidence of this
transition happening in the field of ab initio tertiary-structure pre
diction. (C) Current Biology Ltd.