Скачать или смотреть #BioBasics

While proteins may conjure up the thought of a hunk of meat or a chunk of tofu, the proteins we eat are not the same as those our body makes. Proteins are, quite literally, the workhorses keeping us alive. Manufactured from building blocks called amino acids, with instructions supplied from DNA, long one-dimensional chains of amino acids then bend and fold, twist and turn into complex three-dimensional shapes. Those shapes are proteins — incredibly powerful machines that perform nearly all tasks in the body. Some proteins build structures like muscles or skin, others carry messages, fight infections, or facilitate essential chemical reactions within cells — without proteins, life would not be possible.