Chirality is best described using the analogy of gloves: a right-handed glove and a left-handed glove are mirror images of each other. Proteins in living things contain only left-handed shaped amino acids used to build proteins (with very few exceptions). If right-handed amino acids were inserted into any protein chain, the protein chain would never function properly. No known natural process can explain how proteins would form left-handed amino acids.
The Miller Urey experiment is reported as having produced (“reported” because it has never been replicated) right handed amino acid chemical structures (amino acids are not alive) but no left handed structures. Therefore, the amino acids manufactured within the experiment were unusable for protein formation in Life.1
The Miller Urey experiment failed to reproduce any amino acid structure used by any living organism.
The Miller Urey experiment may have produced a few unusable amino acid right handed structures (double carbon bonded chemical structure). It should be noted that other problems within the experiment included the oxygen paradox, water paradox, amino acids used by life only manufactured by other living things, no meteor amino acids used in life, and the process included intelligent design by scientists and not random processes filled with paradoxes.