Display title | Mirror Chemistry |
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Article description: (description ) This attribute controls the content of the description and og:description elements. | Most of the molecules required for life have the property known as chirality or "handedness". That is, they are not the same as their mirror image, like a left shoe which will not fit properly on your right foot no matter how you rotate it. That wouldn't have been that much of a problem, if not for the one insignificant fact that most of the stuff our bodies are made of, mainly the amino acids, which are the building blocks for the proteins we consist of, are chiral. And all multicell organisms on Earth are made of L-(or levo-)amino acids: that is, most of the molecule's atoms are on the left side.[1] Dextro-amino acids (except cysteine) are exceedingly rare in Earth organisms and are used only by some bacteria and in a few very specialized cases by larger creatures. Referencing this fact is a fairly common way for science-fiction writers to Show Their Work. It generally comes up in one of two situations: |