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| Amino Acid Chirality chirality with hands from http://www.nai.arc.nasa.gov/ A "chiral" molecule is one that is not superposable with its mirror image. Like left and right hands that have a thumb, fingers in the same order, but are mirror images and not the same, chiral molecules have the same things attached in the same order, but are mirror images and not the same. Although most amino acids can exist in both left and right handed forms, Life on Earth is made of left handed amino acids, almost exclusively. Source: Wikipedia |
One of the creationist 'gap' arguments you see pulled out of the toy box and dusted off once in a while is the so-called 'chirality' or handedness problem. The reason it's used so infrequently is probably because so few creationists have the capacity to understand what the term 'chirality' means. The 'problem' is to explain why all amino acids (and so biological proteins) and sugars are composed only of one enantiomere, 'L' in the case of amino acids and 'D' in the case of sugars.
Like so many creationist presuppositional 'gap' arguments, the answer is that the presupposed god did it. No evidence need ever be offered of the existence of this god nor any explanation of how or why it did whatever it is claimed to have done. 'Magic' and 'mystery' satisfy a creationist.
But now this creationist-satisfying gap might have closed according to a paper published in The Astrophysics Journal Letters by two STanford University physicists, Noemie Globus and Roger D. Blandford.
Taylor Kubota of Stanford News Service explains:


















