Tiny Gold Nanogaps Could Crack the Chirality Puzzle

Tiny Gold Nanogaps Could Crack the Chirality Puzzle

Looking for biosignatures across the solar system requires looking for asymmetry. Amino acids, the building blocks of proteins, are famously either “left-handed” (L) or “right-handed” (D). We know abiotic processes (i.e. those that create amino acids but don’t involve life) create a 50/50 mixture of the two types, which is called a racemic mixture. But life as we know it almost exclusively relies on left-handed amino acids to fold proteins and r…