pR4810K

pR4810K is a hypothetical plasmid vector frequently used in molecular biology education to illustrate standard plasmid architecture and cloning workflows. It serves as a representative example in textbooks and courses to discuss common cloning concepts without referencing a real commercial product.

Design and components: pR4810K is described as a circular, double-stranded DNA molecule with an approximate size around 5 kilobases. It includes an origin of replication (ori) compatible with Escherichia coli, providing a low- to medium-copy number in standard host strains. The plasmid carries a selectable marker gene such as kanamycin resistance (kanR) to enable selection on kanamycin-containing media. Its multiple cloning site (MCS) is positioned downstream of a promoter, allowing insertion and expression of passenger genes. A transcriptional terminator is typically included, and some educational variants may feature a reporter gene (for example, GFP or lacZ) to facilitate screening.

Host range, use, and practical applications: In instructional contexts, pR4810K is described as primarily used in E. coli and related Gram-negative bacteria, with modular features that can be swapped to fit different teaching scenarios. It is employed to illustrate cloning steps, plasmid maintenance, antibiotic selection, and basic gene expression concepts. The modular design supports demonstrations of promoter activity, gene insertion, and transcriptional regulation within a controlled, non-clinical framework.

Variants and related plasmids: The pR-series conceptually represents a family of vectors sharing architecture but differing in origin, marker, and MCS configurations, enabling a range of educational and experimental applications.

Limitations and safety: As a hypothetical construct, pR4810K exists in teaching resources and is not intended for real laboratory use. Real experiments should rely on approved, well-documented plasmids from reputable suppliers, with adherence to institutional biosafety guidelines.