A-signalling and the cell density requirement for Myxococcus xanthus development.

Abstract excerpt

Mutations in any of three asg (A-signalling) loci cause fruiting body development of Myxococcus xanthus to arrest at about the 2-h stage. Development can be restored to asg mutants by the addition of conditioned buffer in which wild-type cells have been developing or of A-factor purified from the conditioned buffer. Two forms of A-factor have been identified: heat-stable A-factor, which is composed of amino acids...

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