"The scientist uses several copies of another bit of RNA called a primer. A primer is like a mirror image of a short bit of RNA or single strand of DNA; that is, its sequence of nucleotides is the direct complement to the sequence of nucleotides in a known part of the target RNA or DNA."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.