<prompt> Glycine can be synthesized by all except:GlyoxalateLeucineSerineThreonine  <response>: Glycine metabolism The pink boxes serine, threonine, and glyoxylateare the one from which glycine can be formed Substrate Enzyme catalysing Threonine Threonine aldolase Serine serine-hydroxy methyl transferase Glyoxylate glycine transaminase Extra information: Glycine can also be synthesized from choline through betaine and sarcosine as intermediates in the pathway. 