Abstract
The acid soluble collagen (ASC) and pepsin soluble collagen (PSC) were extracted from the outer skin of Sepiella inermis and further characterized partially. The yield of ASC was low (0.58% on dry weight basis); whereas the yield of PSC was comparatively more (16.23% on dry weight basis). The protein content in ASC and PSC was calculated as 20.24 and 69.56%, respectively (on dry weight basis). The sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) gel profile showed two bands for ASC and PSC with corresponding molecular weight of 86 and 67 kDa and 86, 63 and 58 kDa respectively. The differential scanning calorimetry (DSC) results showed that ASC withstand up to 75.93°C whereas the PSC withstand up to 75.05°C. The fourier transform infrared spectroscopy (FT-IR) spectrum of both ASC and PSC recorded 11 and 13 peaks, respectively. The fine structure of both ASC and PSC was also studied using scanning electron microscopy (SEM). Key words: Sepiella inermis, acid soluble collagen (ASC), pepsin soluble collagen (PSC), differential scanning calorimetry (DSC), fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM).
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