In the present study, keratinase from Stenotrophomonas maltophilia R13 was used for the first time as a reducing agent for the eco-friendly synthesis of AgNPs. The keratinase produced by strain R13 was responsible for the reduction of silver ions and the subsequent formation of AgNPs. Maximum AgNP synthesis was achieved using 2 mM AgNO at pH 9 and 40 °C.
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