Vitamins Study questions Flashcards
Which AA is hwolly incorporated into purines?
glycine
Which amino acid is a major precursor for gluconeogenesis?
alanine
Which amino acid is a major donor of 1- carbons to THF?
serine (histidine, glycine, trypt)
Which AA are components of glutathione?
cysteine, glycine, glutamate
Which AA are BCAA?
leucine, valine, isoleucine
Which AA is synthesized in a B12 mediated rxn?
methionine
Which AA is a major fuel for enterocytes?
glutamine
Which AA are nitrogen carriers in circulation?
Alanine, glutamine
Which AA residues are hydroxylated in Vit C mediated processes?
proline, lysine (scurvy)
Which AA is a precursor to serine?
tryptophan
Which AA is a precursor to melanins?
tyrosine
Which AA is a precursor to catecholamines?
tyrosine
Which AA is a N donor in the urea cycle?
aspartate
Which AA is wholly incorporated into pyrimidines?
aspartate
Which AA are N donors in purine synthesis?
glycine, aspartate, glutamine
Which AA are N donors in pyrimidine synthesis?
aspartate, glutamine
Catabolism of which AA is impaired by phenylketonuria?
phenylalanine
Which amino acids are precursors to carnitine?
lysine, methionine
Which AA is a N donor in both purine and pyrimidine synthesis?
glutamine and aspartate
Which AA is a precursor for niacin?
tryptophan
Which AA are most important in buffering pH?
histidine and cysteine