sxy-1, a Haemophilus influenzae mutation causing greatly enhanced spontaneous competence.

Abstract excerpt

A Haemophilus influenzae strain carrying a competence-enhancing mutation (sxy-1) was selected by transformation of a mutagenized culture in exponential growth at low cell density, where spontaneous competence is very rare. Under these conditions, sxy-1 cells spontaneously transformed 100 to 1,000 times more efficiently than wild-type cells. Moreover, sxy-1 cells responded to all known competence-inducing...

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