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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Identification of (12-Ricinoleoylricinoleoyl)diricinoleoylglycerol,an Acylglycerol Containing Four Acyl Chains,in Castor (Ricinus communis L) Oil by LC-ESI-MS
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Identification of (12-Ricinoleoylricinoleoyl)diricinoleoylglycerol,an Acylglycerol Containing Four Acyl Chains,in Castor (Ricinus communis L) Oil by LC-ESI-MS

机译：蓖麻油中的（12-蓖麻油基蓖麻油基）二蓖麻油基甘油的鉴别-蓖麻油中含有四个酰基链的酰基甘油的LC-ESI-MS分析

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摘要

An acylglycerol (AG) containing four acyl chains,(12-ricinoleoylricinoleoyl)diricinoleoylglycerol (RRRR),was positively identified for the first time in a natural source in castor oil using electrospray ionization tandem mass spectrometry (ESI-MS/MS).HPLC-purified RRRR from castor oil was subjected to ion trap and high-resolution ESI-MS/MS.The precursor and fragment ions of [RRRR+Na]~+ showed the expected masses,and the sodiated fragment ions of both diacylglycerols and fatty acids were detected.Because fragment ions of fatty acids from [AG+NH_4]~+ adducts cannot be detected by ESI-MS/MS,[AG+Na]~+ adducts are more informative.Radiolabeled triricinolein (RRR) was incorporated into RRRR in castor microsomes,indicating that RRRR is biosynthesized in castor bean.This newly identified and biosynthesized RRRR represents a new AG subclass of tetra-acylglycerols (or acylacyldiacylglycerol).
机译：使用电喷雾电离串联质谱法（ESI-MS / MS）在蓖麻油中的天然来源中首次鉴定出含有四个酰基链的（12-蓖麻油基蓖麻油基基）二蓖麻油基甘油基（RRRR）的酰基甘油（AG）。对蓖麻油中纯化的RRRR进行离子阱和高分辨率ESI-MS / MS分析。[RRRR + Na]〜+的前体离子和碎片离子显示出预期的质量，二酰基甘油和脂肪酸的钠离子碎片均由于ESI-MS / MS无法检测到[AG + NH_4]〜+加合物中的脂肪酸碎片离子，因此[AG + Na]〜+加合物的信息量更大。蓖麻中的RRRR中掺入了放射性标记的三蓖麻油精（RRR）微粒体，表明RRRR是在蓖麻子中生物合成的。这种新近鉴定和生物合成的RRRR代表新的AG的四酰基甘油亚基（或酰基乙酰基二酰基甘油）。

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