<prompt> Semi essential amino acids are a Arginineb Lysinec Leucined Histidinebcacad  <response>: Semi essential amino acidsSemi essential amino acids are ones that can sometimes be made internally if conditions are right.Arginine and histidine are such amino acids that can be converted from other amino acids.Also knowConditionally essential amino acidsNon-essential amino acids become essential if their precursors are deficient.Examples Tyrosine derived from pheylalanine and cysteine derived from methionine. 