title: [Comparative study of the pili isolated from the Hfr and F -  strains of Escherichia coli K12].
mesh_terms: D002499:Centrifugation, Density Gradient; D003090:Coliphages; D003227:Conjugation, Genetic; D003434:Crossing Over, Genetic; D004926:Escherichia coli / Q000166:cytology*; D005260:Female; D008297:Male; D008854:Microscopy, Electron
vernacular_title: Etude comparative des pili isolés des souches Hfr etF -  d'Escherichia coli K12.