title: Visual detection of cysteine and homocysteine.
abstract: The determination of cysteine and homocysteine levels is of great current interest for the monitoring of desease states. A new colorimetric method for the simultaneous detection of l-cysteine and l-homocysteine has been developed. A fluorescein derivative reacts with the above amino acids, producing their respective thiazolidines resulting in color changes. Interference from other amino acids and proteins is minimal.
authors.affiliation: Department of Chemistry and Center for Advanced Microstructures and Devices, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
authors.forename: Oleksandr
authors.initials: O
authors.lastname: Rusin
authors.forename: Nadia N
authors.initials: NN
authors.lastname: St  Luce
authors.forename: Rezik A
authors.initials: RA
authors.lastname: Agbaria
authors.forename: Jorge O
authors.initials: JO
authors.lastname: Escobedo
authors.forename: Shan
authors.initials: S
authors.lastname: Jiang
authors.forename: Isiah M
authors.initials: IM
authors.lastname: Warner
authors.forename: Fareed B
authors.initials: FB
authors.lastname: Dawan
authors.forename: Kun
authors.initials: K
authors.lastname: Lian
authors.forename: Robert M
authors.initials: RM
authors.lastname: Strongin
mesh_terms: D003124:Colorimetry / Q000379:methods; D004396:Coloring Agents / Q000737:chemistry; D003545:Cysteine / Q000032:analysis* / Q000737:chemistry; D005470:Fluorometry / Q000379:methods; D006710:Homocysteine / Q000032:analysis* / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D014966:Xanthenes / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D014966:Xanthenes; D006710:Homocysteine; D003545:Cysteine