L-Pyrrolysine

L-pyrrolysine is known as the "22nd proteinogenic amino acid," and it is even rarer than selenocysteine. It is utilized by some methane-producing archaea and at least one bacterium in enzymes that are part of their methane metabolism. Like selenocysteine, pyrrolysine has a unique insertion mechanism during protein synthesis, encoded by the UAG stop codon under specific cellular conditions. Its complex chemical structure, derived from lysine, allows it to participate in specialized catalytic functions that are not possible with the standard 20 amino acids, highlighting the diverse biochemical strategies employed by life. Explore searchable catalogue of hundreds of molecules, including details on how models were generated. NotesIf you happen to break something, use superglue to fix it. It will make the broken part even stronger.I decided to go with the ball-and-stick type, as it is easiest to color, is rigid, and looks awesome.The model represents the major resonance contributor.