... fragment onlycontains the initial 67 bp and the final 68 bp of the pur4coding sequence. It was inserted in plasmid pGM9. The resulting construct was introduced, via S. lividans,intoS. alboniger. ... mutants with 3¢-amino-3¢-deoxyadenosine, S medium cultures(5 mL) either in the presence or absence of 30 lgÆmL)13¢-amino-3¢-deoxyadenosine were inoculated with spores of the different strains. Incubation ... Ara-A),antitumoral (oxanosine, neplanocin A), herbicidal (poly-oxins), insecticidal (nikkomycins), inmunostimulative and inmunosuppressive agents (bredinin) (reviewed in [1]).A201A is one of these antibiotics,...