Dominus Pyroglutamic acidum (also known as PCA, V-oxoproline, pidolic acidum aut pyroglutamate eius basic forma) est ubiquitous non minus naturali studuerunt amino acidum sit posterius quod liberum amino coetus de glutamic acidum aut glutamine cyclizes formare est Lactam It is a metabolite in glutathione exolvuntur qui convertitur ad V-oxoprolinase.Pyroglutamate glutamate a comprehendo is in multa bacteriorhodopsin proteins. N-terminatio glutamic acidum et facti sunt pyroglutamate cyclize glutamine residua non sua sponte, non fuerit conversus a enzymatically glutaminyl cyclases. Hoc unum obstitit complures formas in quibus expressius fiebat N, N-terminatio ad praesentem quaestionem de sequencing per Edman liber, libera, quae requirit primaria coetus non est praesens in amino acidum pyroglutamic. In enzyme potest restituere pyroglutamate aminopeptidase libera N-off in finem, inquantum adhaerendo pyroglutamate eis.