Abstract
.lambda.gtWES derivatives carrying the citG (fumarase) gene of B. subtilis were detected by complementation of an Escherichia coli fumarase mutation in lysogen-filled plaques. The gerA gene, mutations in which affect the germination response of spores to L-alanine, is also present on the 2 citG transducing phages described. The cloned regions in these 2 phages include EcoRI-generated fragments of 5.0 and 1.4 kb [kilobases]; the former fragment carries citG4+.