title: Structural and spectroscopic elucidation of tetrapetide glycyl-(L)-prolyl-glycyl-glycine and its hydrogensquarate.
abstract: The IR-spectroscopic and structural elucidation of tetrapeptide glycyl-(L)-prolyl-glycyl-glycine and its hydrogensquarate was performed by employing linear-polarized IR-spectroscopy of oriented colloid suspensions in nematic host as well as mass spectrometry. Quantum-chemical ab initio calculations were carried out in order to evaluate both the electronic structure and optical properties of the compound studied.
authors.affiliation: Plovdiv University, Department of Organic Chemistry, 24 Tzar Assen Str., Plovdiv 4000, Bulgaria. kolev@orgchm.bas.bg
authors.forename: Tsonko M
authors.initials: TM
authors.lastname: Kolev
mesh_terms: D002851:Chromatography, High Pressure Liquid; D003503:Cyclobutanes / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D009842:Oligopeptides / Q000737:chemistry*; D011392:Proline / Q000031:analogs & derivatives* / Q000737:chemistry; D011487:Protein Conformation; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared / Q000379:methods; D053719:Tandem Mass Spectrometry
chemical_list: D003503:Cyclobutanes; D009842:Oligopeptides; C113165:glycyl-prolyl-glycyl-glycine; D011392:Proline; C030042:squaric acid