Optimize and Purification of Keratinase Produced from Local Aspergillus Terreus A13 Isolate Using A Feather as Substrate. Iraqi Journal of Science [Internet]. 2023 Oct. 30 [cited 2024 Nov. 19];64(10):5051-63. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/8425