There are multiple peptidoglycan hydrolases associated with Bacillus s
ubtilis 168 and these potentially lethal enzymes have been implicated
in a number of important cellular processes, Several enzymes have been
studied at the molecular level and their structural genes characteriz
ed. This information has begun to identify roles for individual enzyme
s in motility, cell separation, differentiation, and phage lysis, It h
as become apparent that in many cases important autolytic functions ca
n be performed by more than one enzyme, so the complex web of mutually
compensatory components can be unraveled only by making multiple muta
nts, One such multiple mutant has revealed the presence of several pre
viously unknown minor autolysins, the functions of which are currently
obscure.