Altun, OezlenBilcen, Selin2024-06-122024-06-1220101386-14251873-3557https://doi.org/10.1016/j.saa.2009.11.056https://hdl.handle.net/20.500.14551/22207In this work, the reactions involving L-phenylalanine and D,L-tryptophan in the presence of Cu(II) ion were studied. Optimum conditions for the reactions were established as pH 7 and lambda=641 nm. When the reaction was kinetic, it was observed that the following rate formula was found as dA/A(n) = kdt and k = 3.2 x 10(-4) s(-1), according to absorbance measurements. Using a perpetual change curve, the ratio of [Cu]/[Cu] +L-phenylalanine + [D,L-tryptophan] was found 1:1:1. According to this result, one molecule of L-phenylalanine and one molecule of D,L-tryptophan react with one molecule Cu(II) ion. (C) 2009 Elsevier B.V. All rights reserved.en10.1016/j.saa.2009.11.056info:eu-repo/semantics/closedAccessL-PhenylalanineD,L-TryptophanCopper(II)SpectrophotometryReaction KineticCarbon-Paste ElectrodeTryptophanAcidCytotoxicityNicotinamideEquilibriumHydrolysisCysteineCrystalLeucineArticle752789793Q2WOS:0002745912000452-s2.0-7374908709320034847Q2