"If secondary structure is like a sheet of paper or a slinky, then tertiary structure is folding that sheet of paper or tying the slinky into a more complex shape. The tertiary structure of a protein is stabilized by interactions between different R groups."
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.