Task: Text Categorization
Input (English): One of these objects denoted JM1 regulates iron uptake, and the Rep/STB system is responsible for partitioning another of these objects, 2m, between mother and daughter cells in yeast. Clowes divided one class of these objects into "stringent" and "relaxed," and a meeting in a Honolulu delicatessen led to Cohen and Boyer's agreement to collaborate on several experiments advancing their study, including the (*) cleavage of SC101 by the restriction enzyme EcoRI. A process involving sex pili, conjugation, allows organisms to transfer these objects. For 10 points, name these common cloning vectors, often consisting of circular non-nuclear DNA fragments, the best known of which are F, which initiates conjugation, and R, used to confer antibiotic resistance.
Output (English): Science