coli DNA ligase that she had obtained from Paul Modrich ... along with their drug-resistance plasmid as a new, improved cloning vector to show that frog DNA could also be replicated and transcribed in ...

A plasmid is a small, circular, double-stranded DNA molecule that is distinct from a cell's chromosomal DNA. Plasmids naturally exist in bacterial cells, and they also occur in some eukaryotes.

Scientists in The Wistar Institute lab of David B. Weiner, Ph.D., have described a next-generation vaccination technology ...