Sodyum Dodesil sülfat poliakrilamid jel elektroforezi (SDS-PAGE), bir protein karışımının bileşenleri ayrı ayrı çözmek için en yaygın kullanılan analitik yöntemdir. Ayrıca bir proteinin saflığını elektroforetik bir yöntemle değerlendirmek neredeyse zorunlu hale gelmiştir. SDS-PAGE, proteinlerin moleküler boyuttaki farklılıkları ile jel matrisi boyunca %1' den daha az farklılık gösteren elektroforetik hareketliliklerini aynı anda kullanarak proteinleri birbirinden ayırır. Teknik aynı zamanda proteinlerin moleküler ağırlıklarını tahmin etme de güçlü bir araçtır.
Protein analizinde vazgeçilmez bir araç olarak SDS-PAGE'in başarısı, elektroforetik hareketliliğin bir proteinin moleküler kütlesi ile korelasyonuna izin vermektedir. Ve günümüzde başarılı bir SDS-PAGE analizi sadece ve sadece dikkatli numune hazırlama ve yüklemeden önce işlemlere bağlıdır.
Bu makalede en basit SDS-PAGE analizinin farklı et ve sakatat örneklerinin ayrımında kullanılabileceği anlatılmaktadır.
Referans1. Alamprese, C., Amigo, J. M., Casiraghi, E. ve Engelsen, S. B. (2016). Identification and quantification of turkey meat adulteration in fresh, frozen-thawed and cooked minced beef by FT-NIR spectroscopy and chemometrics. Meat Science, 121, 175-181. https://doi.org/10.1016/j.meatsci.2016.06.018
Referans2. Chrambach, A. ve Rodbard, D. (1971). Polyacrylamide gel electrophoresis. Science, 172(3982), 440-451. https://doi.org/10.1126/science.172.3982.440
Referans3. Dalsecco, L. S., Palhares, R. M., Oliveira, P. C., Teixeira, L. V., Drummond, M. G. ve De Oliveira, D. A. A. (2018). A fast and reliable real‐time PCR method for detection of ten animal species in meat products. Journal of Food Science, 83(2), 258-265. https://doi.org/10.1111/1750-3841.14001
Referans4. Davis, B. J. (1964). Method and application tohuman serum protein. Ann. NY Acad. Sci., 121(2), 404-427.
Referans5. Deniz, E., Güneş Altuntaş, E., Ayhan, B., İğci, N., Özel Demiralp, D. ve Candoğan, K. (2018). Differentiation of beef mixtures adulterated with chicken or turkey meat using FTIR spectroscopy. Journal of Food Processing and Preservation, 42(10), e13767. https://doi.org/10.1111/jfpp.13767
Referans6. Gecaj, R. M., Muji, S., Ajazi, F. C., Berisha, B., Kryeziu, A. ve Ismaili, M. (2021). Investigation of pork meat in chicken-and beef-based commercial products by ELISA and real-time PCR sold at retail in Kosovo. Czech Journal of Food Sciences, 39(5), 368-375. https://doi.org/10.17221/164/2020-CJFS
Referans7. Hassoun, A., Måge, I., Schmidt, W. F., Temiz, H. T., Li, L., Kim, H. -Y., Nilsen, H., Biancolillo, A., Kaddour, A. A., Sikorski, M., Sikorska, E., Grassi, S. ve Cozzolino, D. (2020). Fraud in animal origin food products: Advances in emerging spectroscopic detection methods over the past five years. Foods, 9(8), 1069. https://doi.org/10.3390/foods9081069
Referans8. Kim, M. J., Suh, S. M., Kim, S. Y., Qin, P., Kim, H. R. ve Kim, H. Y. (2020). Development of a real-time PCR assay for the detection of donkey (Equus asinus) meat in meat mixtures treated under different processing conditions. Foods, 9(2), 130. https://doi.org/10.3390/foods9020130
KReferans9. im, M., Yoo, I., Lee, S. -Y., Hong, Y. ve Kim, H. -Y. (2016). Quantitative detection of pork in commercial meat products by TaqMan® real-time PCR assay targeting the mitochondrial D-loop region. Food Chemistry, 210, 102-106. https://doi.org/10.1016/j.foodchem.2016.04.084
Referans10. Kuswandi, B., Cendekiawan, K. A., Kristiningrum, N. ve Ahmad, M. (2015). Pork adulteration in commercial meatballs determined by chemometric analysis of NIR Spectra. Journal of Food Measurement and Characterization, 9(3), 313-323. https://doi.org/10.1007/s11694-015-9238-3
Referans11. Laemmli, U. K. (1970). Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature, 227(5259), 680-685. https://doi.org/10.1038/227680a0
Referans12. Lowry, O. H. (1951). Rosebrough, NJ, Farr, AL, and Randall, RJ Protein measurement with the Folin phenol reagent. J. Biol. Chem, 193(1), 265-275.
Referans14. Luykx, D. M. A. M. ve Van Ruth, S. M. (2008). An overview of analytical methods for determining the geographical origin of food products. Food Chemistry, 107(2), 897-911. https://doi.org/10.1016/j.foodchem.2007.09.038
Referans15. Marshak, D. R., Kadonaga, J. T., Burgess, R. R., Knuth, M. W., Brennan, W. A. ve Lin, S. H. (1996). Strategies for protein purification and characterization: a laboratory course manual. Cold Spring Harbor Laboratory.
Referans16. Matsudaira, P. T. ve Burgess, D. R. (1978). SDS microslab linear gradient polyacrylamide gel electrophoresis. Analytical Biochemistry, 87(2), 386-396. https://doi.org/10.1016/0003-2697(78)90688-7
Referans17. Neville, D. M. ve Glossmann, H. (1974). Molecular weight determination of membrane protein and glycoprotein subunits by discontinuous gel electrophoresis in dodecyl sulfate. In Methods in Enzymology (Fleischer, S. ve Packer, L., Eds.), 32, 92-102. New York: Academic Press.
Referans18. Ornstein, L. (1964). Disc Electrophoresis - I Background and Theory. Annals of the New York Academy of Sciences, 121(2), 321-349. https://doi.org/10.1111/j.1749-6632.1964.tb14207.x
Referans19. Rady, A. ve Adedeji, A. (2018). Assessing different processed meats for adulterants using visible-near-infrared spectroscopy. Meat Science, 136, 59-67. https://doi.org/10.1016/j.meatsci.2017.10.014
Referans20. Reynolds, J. A. ve Tanford, C. (1970). Binding of dodecyl sulfate to proteins at high binding ratios. Possible implications for the state of proteins in biological membranes. Proceedings of the National Academy of Sciences, 66(3), 1002-1007. https://doi.org/10.1073/pnas.66.3.1002
Referans21. Ropodi, A. I., Panagou, E. Z. ve Nychas, G. -J. E. (2017). Multispectral imaging (MSI): A promising method for the detection of minced beef adulteration with horsemeat. Food Control, 73, 57-63. https://doi.org/10.1016/j.foodcont.2016.05.048
Referans22. Różycki, M., Chmurzyńska, E., Bilska-Zając, E., Karamon, J. ve Cencek, T. (2018). Isoelectric focusing of proteins in the pH gradient as a tool for identification of species origin of raw meat. Journal of Veterinary Research, 62(2), 151-159. https://doi.org/10.2478/jvetres-2018-0024
Referans23. Scopes, R. K. (1993). Protein purification: principles and practice. Springer Science & Business Media.
Referans24. Shapiro, A. L. ve Maizel, J. V. (1969). Molecular weight estimation of polypeptides by SDS polyacrylamide gel electrophoresis: further data concerning resolving power and general considerations. Analytical Biochemistry, 29(3), 505-514. https://doi.org/10.1016/0003-2697(69)90335-2
Referans25. Schägger, H. ve Von Jagow, G. (1987). Tricine-sodium dodecyl sulfate-polyacrylamide gel electrophoresis for the separation of proteins in the range from 1 to 100 kDa. Analytical Biochemistry, 166(2), 368-379. https://doi.org/10.1016/0003-2697(87)90587-2
Referans26. Spychaj, A. ve Mozdziak, P. E. (2009). PCR methods in meat species identification as a tool for the verification of regional and traditional meat products. Acta Scientiarum Polonorum Technologia Alimentaria, 8(2), 5-20.
Referans27. Weber, K., Pringle, J. R. ve Osborn, M. (1972). Measurement of molecular weights by electrophoresis on SDS-acrylamide gel. In Methods in Enzymology, 26, 3-27. Academic Press.