Protein

"...s out of your product means you save resources on everyone who does sign up. For those larger molecules, the membrane contains hundreds of different protein types embedded in the bilayer. I call these The Four Membrane Proteins Model - four distinct mechanisms cells use to manage what enters and exits..."

"...rgy. Metabolism has two complementary halves: Anabolism is building up. It's synthesis, construction, growth. When your body builds muscle from protein, that's anabolism. When a plant converts carbon dioxide and sunlight into glucose, that's anabolism. When a cell manufactures the proteins it needs t..."

"...those signals internally (this information must reach the nucleus) 3. Mechanisms to halt division (turning off growth genes, activating inhibitor proteins) Without all three, you get uncontrolled growth. With them, you get sustainable, healthy, appropriate growth that supports the organism long-term. ..."

"... the same problem as every business: they're surrounded by information, most of it irrelevant. A typical mammalian cell membrane contains millions of protein molecules. Only a fraction are receptors - specialized sensors that detect specific signals and ignore everything else. This selectivity isn't a bug..."

"... chemical letters copied with one error per billion. The cell elongates. Cytoplasm flows. The two DNA loops migrate to opposite ends. Then a ring of protein cinches the middle like a drawstring pulled tight. The membrane pinches. The wall seals. Two cells where there was one. Perfect copy. Every time."