"I'm sure you already know that mitochondria are the "powerhouse of the cell", which involves pumping protons across the inner mitochondrial membrane to generate a proton gradient. Generating the proton gradient is like charging a battery, and it provides the energy required for various mitochondrial proteins to function."
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.