Question
Which of the following amino acids are present in ornithine cycle
Valine and cystine
Arginine and citrulline
Glycine and methionine
None of these
Solution
B.
Arginine and citrulline
Ornithine cycle takes place in liver. The amino acid arginine and citrulline are formed during this cycle. Therefore it is referred as ornithine, arginine cycle and also Kreb-Henseleit cycle. The products of this cycle are urea and ornithine. The substances excreted through this cycle are CO2 and NH2
