Characterization and growth profile of proteolytic strain PK-4 isolated from local slaughterhouse wastewaterNanung Agus Fitriyanto, Samsul Hadi, Muhammad Imam Bahtiyar, Ragil Adi Prasetyo and Yuny ErwantoBIO Web Conf., 28 (2020) 03001DOI: https://doi.org/10.1051/bioconf/20202803001