FLENSBURG JOHN 605,200 Regulatory mechanisms causing overpro duction of dihydrofolstex reductase and resistance to antifolates in Escherichia coli :[doctoral dissertation] John Flens- burg ; [University of Uppsala]. -Uppsala ; Departament of Microbiology. Faculty of Pharmacy Univ. 1984. - 43s. ; il., wykr ; 22 cm + wkł. ; [1]k.