what is orir?
Definition of oriR, the minimum DNA segment essential for initiation of R1 plasmid replication in vitro. Masai H, Kaziro Y, Arai K. The 3.6-kilobase Bgl II-EcoRI fragment from R1 plasmid containing copA, repA, and the replication origin (ori) was inserted into the ColE1-type plasmid pUC8.