Tiezzi E, Valensin D
Biofizika. 1976 May-Jun;21(3):401-8.
A proton NMR study was carried out on complexes of Mn(II) with amino acids and peptides in aqueous solution. The theory, based on the Solomon-Bloembergen equations, was summarized and discussed. Different types of equilibria involving the anionic and zwittrionic forms of the amino acids were taken into account, together with the presence of outer- and inner-sphere species. The related correlation times were evaluated. Sarcosine, beta-alanine, threonine, tyrosine, valine, beta-alanine, proline, histidine and cystein complexes with Mn(II) were investigated on the basis of the NMR spectra. Moreover, diglycine and triglycine were studied in the presence of manganous ion at different pH value. The findings were discussed in terms of selective broadening of the NMR peaks and compared with data in the literature.
在水溶液中对锰（II）与氨基酸和肽的配合物进行了质子核磁共振研究。总结并讨论了基于所罗门 - 布洛姆伯根方程的理论。考虑了涉及氨基酸阴离子和两性离子形式的不同类型平衡，以及外层和内层物种的存在。评估了相关的弛豫时间。基于核磁共振光谱研究了肌氨酸、β - 丙氨酸、苏氨酸、酪氨酸、缬氨酸、β - 丙氨酸、脯氨酸、组氨酸和半胱氨酸与锰（II）的配合物。此外，研究了在不同pH值下甘氨酰甘氨酸和甘氨酰甘氨酰甘氨酸在锰离子存在下的情况。根据核磁共振峰的选择性展宽对研究结果进行了讨论，并与文献数据进行了比较。
