*4.5. Antidiabetic Activity*

The antidiabetic activity was investigated in vitro through the inhibition of α- amylase, an enzyme that digests starch. AgNPs synthesized from *P. giganteus* possess good α-amylase inhibition activity, which helps in making diabetic drugs; inhibition percentage can be increased with increasing concentration of biosynthesized AgNPs [51].

#### *4.6. Removal of Dyes*

El-Batal et al. (2014) extracted fungal laccase derived from *P. ostreatus* via solid fermentation. The authors demonstrated that this enzyme could be used to decolorize/degrade numerous dyes, i.e., methyl orange, trypan blue, ramazol brilliant red, and ramazol brilliant yellow with more than fifty percent decolorization in their color within 3 h, confirming the laccase degrading ability. The highest reduction was observed for the methyl orange and trypan blue. Furthermore, laccase enzyme was used to synthesize gold NPs, proving that laccase obtained from *P. ostreatus* had strong potential in many significant industrial applications, for example, in biological pretreatment processes [105,106].
