Sinapinic acid, or sinapic acid (Sinapine - Origin: L. Sinapi, sinapis, mustard, Gr., cf. F. Sinapine.), is a small naturally occurringhydroxycinnamic acid. It is a member of thephenylpropanoid family. It is a commonly used matrix inMALDImass spectrometry.[1][2] It is a useful matrix for a wide variety of peptides and proteins. It serves well as a matrix for MALDI due to its ability to absorblaser radiation and to also donate protons (H+) to the analyte of interest.
Sinapic acid can form dimers with itself (one structure) andferulic acid (three different structures) in cereal cell walls and therefore may have a similar influence on cell-wall structure to that of thediferulic acids.[3]
Sinapine is an alkaloidal amine found in black mustard seeds. It is considered acholine ester of sinapinic acid.[4]
^Bunzel M, Ralph J, Kim H, Lu F, Ralph SA, Marita JM, Hatfield RD, Steinhart H (2003). "Sinapate dehydrodimers and sinapate-ferulate heterodimers in cereal dietary fibre".J. Agric. Food Chem.51 (5):1427–1434.doi:10.1021/jf020910v.PMID12590493.
^Comparison of Phenolic Acids and Flavan-3-ols During Wine Fermentation of Grapes with Different Harvest Times. Rong-Rong Tian, Qiu-Hong Pan, Ji-Cheng Zhan, Jing-Ming Li, Si-Bao Wan, Qing-Hua Zhang and Wei-Dong Huang, Molecules, 2009, 14, pages 827-838,doi:10.3390/molecules14020827
^Gávez MC, Barroso CG, Péez-Bustamante JA (1994). "Analysis of polyphenolic compounds of different vinegar samples".Zeitschrift für Lebensmittel-Untersuchung und -Forschung.199:29–31.doi:10.1007/BF01192948.S2CID91784893.
^Antioxidant canolol production from a renewable feedstock via an engineered decarboxylase. Krista L. Morley, Stephan Grosse, Hannes Leischa and Peter C. K. Lau, Green Chem., 2013,n15, pages 3312-3317,doi:10.1039/C3GC40748A
