SEARCH Articles Figures Tables 3- Alanyl-L-histidine D.L-histidine Glycyl-L-histidine Glycylglycyl-L-histidine L-Histidine Monohydrochloride L-Histidine ammonia lyase L-Histidine methyl ester L-Histidine polymorphs N-Acetyl-L-histidine Poly-L-histidine Secondary Products Synthesized from L-Histidine