Cerdonio M, Congiu-Castellano A, Mogno F, Pispisa B, Romani G L, Vitale S
Proc Natl Acad Sci U S A. 1977 Feb;74(2):398-400. doi: 10.1073/pnas.74.2.398.
When the magnetic susceptibility of frozen aqueous solutions of human oxyhemoglobin was measured in the range between 25 and 250 K, it showed a temperature-dependent behavior typical of a thermal equilibrium between a ground singlet state and an excited triplet state for two electrons per heme, the energy separation being [2J] = 146 cm-1. By contrast, within the same temperature range, carboxyhemoglobin was found to be diamagnetic, as already reported.
当在25至250K的温度范围内测量人氧合血红蛋白冷冻水溶液的磁化率时，它呈现出一种与温度相关的行为，这是每个血红素两个电子在基态单重态和激发三重态之间热平衡的典型表现，能量间隔为[2J] = 146厘米⁻¹。相比之下，在相同温度范围内，如已报道的那样，发现羧基血红蛋白是抗磁性的。
