Encyclopedia > Pyrrolysine

  Article Content


Pyrrolysine is an amino acid used by some bacteria and archaea in enzymes that are part of their methane-producing metabolisms. It is coded for by a UAG codon, which is normally a stop codon named "amber" but whose meaning is modified by the presence of a specific downstream sequence which forms a loop in the mRNA, forcing the incorporation of pyrrolysine instead of terminating transcription.

See also selenocysteine, an amino acid with a similar mechanism of encoding in other organisms.

external links:

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article
Springs, New York

... has a total area of 23.9 km² (9.2 mi²). 21.9 km² (8.5 mi²) of it is land and 2.0 km² (0.8 mi²) of it is water. The total area is 8.24% ...

This page was created in 22.1 ms