Glutamine
In human blood, glutamine is the most abundant free amino acid.
Alpha-Amanitin
"alpha"-Amanitin or α-amanitin is a cyclic peptide of eight amino acids. It is possibly the most deadly of all the amatoxins, toxins found in several species of the mushroom genus "Amanita", one being the death cap ("Amanita phalloides") as well as the destroying angel, a complex of similar species, principally "A. virosa" and "A. bisporigera". It is also found in the mushrooms "Galerina marginata" and "Conocybe filaris". The oral of amanitin is approximately 0.1 mg/kg for rats.