<prompt> Glycine is useful in all of the following exceptPurine synthesisCreatine synthesisSpermine synthesisHeme synthesis  <response>: Spermine is a type of polyamine.This is aliphatic amine and it is synthesized from ornithine. Key enzyme is ornithine decarboxylase. REFERENCE : DM.VASUDEVAN.TEXTBOOK; SEVENTH EDITION ; PAGE NO : 229 