Histidine proton resonances of carbonmonoxyhaemoglobins A and Cowtown in chloride-free buffer.
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.
Shih
D T
DT
Department of Biochemistry, School of Medicine, Oregon Health Sciences University, Portland 97102.
Peratz
M F
MF
Gronenborn
A M
AM
Clore
G M
GM
D002263:Carboxyhemoglobin; D006441:Hemoglobin A; D006455:Hemoglobins, Abnormal; D006639:Histidine; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D011522:Protons
D006455:Hemoglobins, Abnormal; D011522:Protons; D006639:Histidine; C040259:hemoglobin Cowtown; D006441:Hemoglobin A; D002263:Carboxyhemoglobin