Affiliations: Department of Biotechnology, Yuanpei University, Hsin Chu, Taiwan
Note: [] Corresponding author: Prof. Shan-Yang Lin, PhD, Lab. Pharm. Biopharm., Department of Biotechnology, Yuanpei University, Hsin Chu, Taiwan. Tel.: +886 03 5381183~8157; Fax: +886 03 6102328; E-mail: [email protected].
Abstract: Salmon calcitonin (sCT) was selected as a model protein drug for investigating its structural similarity in the solid state by four sample preparation methods, such as tape, smeared, CaF2 and film methods. The conformational changes of sCT in the solid state were estimated by using a second-derivative Fourier transform infrared (FT-IR) microspectroscopy. The tape method was acted as a standard reference. The value of correlation coefficient (r) for smeared method was higher than that of other method, indicating that a novel technique by smearing sCT powder on the surface of KBr pellet was the best optimal sample preparation method.
Keywords: Salmon calcitonin, FT-IR, sample preparation, second derivative, structural similarity
DOI: 10.3233/SPE-2010-0468
Journal: Spectroscopy, vol. 24, no. 5, pp. 511-516, 2010
