Abstract:
This research was aimed to extract collagen from eggshell membrane by acid extraction (0.5 M acetic acid) using different ratio of eggshell membrane: solvent (1:10, and 1:20 w/w) and various extraction times (24, and 48 hours) and investigate the characteristics of collagen extracts by measuring maximum absorbance, protein content, and SDS-PAGE experiment. The results showed that the collagen extracted with eggshell membrane: solvent ratio of 1:20 for 48 hours had the highest extractable yield (3.42±0.11%) and the lowest yield was from the extract using the ratio of 1:10 for 24 hours (1.28±0.17%). Moreover, all four collagen extracts had the maximum absorbance at 230 nm that is the absorbance of hydroxyproline amino acid in collagen. For SDS-PAGE result, all of extracts had other protein that showed the band at 44-54 kDa which was accordance well with glycoprotein in eggshell. The results suggested that eggshell might be used as alternative source of collagen and glycoprotein that can be used as active ingredient in cosmetic and others.