Whichwerederivedfromtwocompatibl‐host‐rangereplicons(Vosetal ﹒.AndszHasBwascarriedondifferentpA‐derivedrepliconsunderthecontrolo lacApromoterintheplasmidpNZ9531‐szHasB ﹒ Thetwoplasmidswereintroducedinto NZ9000,producingstrainNFHA01 ﹒.Anappreciableamountof ......