@article {10.3844/ajavsp.2025.97.102, article_type = {journal}, title = {Isolation and Characterization of Collagen from IndonesiaLocal Duck Feet Using Bromelain Enzyme}, author = {Amanah, Rafika Mila and Putri, Dita Prameswari Trenggono and Abidin, Mohammad Zainal and Erwanto, Yuny}, volume = {20}, number = {2}, year = {2025}, month = {May}, pages = {97-102}, doi = {10.3844/ajavsp.2025.97.102}, url = {https://thescipub.com/abstract/ajavsp.2025.97.102}, abstract = {The utilization of local duck feet as a collagen source to minimizewaste and add value to the duck by-product. This research aimed to isolate andcharacterize collagen from Local duck feet using enzymatic method. Thebromelain enzyme in various concentrations: 0% (A), 0.2% (B), 0.4%(C), 0.6%(D), and 0.8% (E). Variables observed were collagen yield, viscosity, pH,Fourier Transform Infrared Spectroscopy (FTIR), and Sodium Dodecyl SulfatePolyacrylamide Gel Electrophoresis (SDS-PAGE). The results showed the highestcollagen yield was 7.77% from D treatment; the viscosity ranges were 2.18-1.99cP, and the pH ranges were 4.89-4.68. FTIR spectra showed amide A, B, I, II,and III. SDS-PAGE results showed three distinct main bands, consisting of α1,α2, and β chains. In conclusion, collagen could be extracted from Local duckfeet and categorized as collagen type I.}, journal = {American Journal of Animal and Veterinary Sciences}, publisher = {Science Publications} }