Nuclear magnetic resonance evidence for radiation damage of saturated phosphatidylcholine in bilayers
作者:Mariano Casu、Adolfo Lai、Gianni Erriu、Salvatore Onnis、Nazario Zucca
DOI:10.1002/mrc.1260300510
日期:1992.5
Multilayer membranes of 1,2-dipalmitoyl-sn-glycero-3-phosphorylcholine were prepared in D2O and exposed to γ-radiation. Changes in the chemical structure due to irradiation were studied by 1H, 13C and 31P NMR after lyophilization and dissolution in chloroform-methanol (1 : 2, v/v). One- and two-dimensional techniques were used. 1-Palmitoyl-sn-glycero-3-phosphorylcholine, 2-palmitoyl-sn-glycero-3-phosphorylcholine, glycero-3-phosphorylcholine and palmitic acid were identified as new components. Their development during irradiation was quantitatively determined. The results were discussed in terms of possible reaction steps responsible for the radiolytic decomposition.
在D2O中制备了1,2-二棕榈酰-sn-甘油-3-磷酰胆碱的多层膜,并使其暴露于γ射线中。通过1H、13C和31P NMR研究了冻干后在氯仿-甲醇(1:2,v/v)中溶解后因辐射引起的化学结构变化。使用了1维和2维技术。1-棕榈酰-sn-甘油-3-磷酰胆碱、2-棕榈酰-sn-甘油-3-磷酰胆碱、甘油-3-磷酰胆碱和棕榈酸被鉴定为新成分。定量确定了它们在辐射过程中的变化。从可能引起辐射分解的反应步骤的角度讨论了结果。