title: Histidine proton resonances of carbonmonoxyhaemoglobins A and Cowtown in chloride-free buffer.
abstract: A re-examination of the C-2 histidine proton resonances of haemoglobins A and Cowtown (His HC3(146) beta----Leu) in chloride-free Hepes buffer has shown that all the resonances present in haemoglobin A are present in haemoglobin Cowtown, so that the pKa of His HC3(146) beta cannot be determined by nuclear magnetic resonance in this buffer.
authors.affiliation: Department of Biochemistry, School of Medicine, Oregon Health Sciences University, Portland 97102.
authors.forename: D T
authors.initials: DT
authors.lastname: Shih
authors.forename: M F
authors.initials: MF
authors.lastname: Peratz
authors.forename: A M
authors.initials: AM
authors.lastname: Gronenborn
authors.forename: G M
authors.initials: GM
authors.lastname: Clore
mesh_terms: D002263:Carboxyhemoglobin; D006441:Hemoglobin A; D006455:Hemoglobins, Abnormal; D006639:Histidine; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D011522:Protons
chemical_list: D006455:Hemoglobins, Abnormal; D011522:Protons; D006639:Histidine; C040259:hemoglobin Cowtown; D006441:Hemoglobin A; D002263:Carboxyhemoglobin