FAQ: Is the M13mp18 Single-Stranded DNA (N4040S) circular or linear?

The M13mp18 Single-Stranded DNA is a circular molecule, purified from the M13mp18 phage. The vast majority of the molecules are circular, with the remaining molecules being in the linear form, as determined by agarose gel electrophoresis. The presence of linear DNA is inherent to the purification process.