Amino Acids, Proteins and Porphyrins
Essential amino acid all except (AIIMS May 2007)
Essential amino acid is the one which cannot be synthesized denovo in the body and hence has to be supplied in the diet.
"Any Help In Learning These Little Molecules Proves Truly Valuable".
"Arginine, Histidine, Isoleucine, Leucine, Threonine, Lysine, Methionine, Phenylalanine, Tryptophan, Valine" in that order
Out of these, Arginine and Histidine are semiessentialaminoacids because though they can be synthesized in the body, since they are required in excess during certain periods, they become essential only in such circumstances.