“…EPR, the 4′-epimer of Doxorubicin, displayed a similar tumor response during clinical trials of its application to breast cancer and the therapeutic effects . Hence, these properties of EPR are important as they have direct consequences in clinical research. , Lysozyme is a small globular protein consisting of 129 amino acid residues, which comprise six tryptophan (Trp) residues, three tyrosine residues, and four disulfide bonds (Scheme a). , It has already been reported that the tryptophan residues W62 and W108 are responsible for the intrinsic fluorescence in Lyz. ,,, Lyz can hydrolyze β-1,4-glycosidic linkages between N -acetylmuramic acid and N -acetyl glucosamine present in the peptidoglycan cell wall of bacteria, leading to bacterial cell lyses . The protein consists of two domains, namely α-domain (mainly comprising the α-helix) and β-domain (mainly comprising the β-sheet). , The substrate binding site (also known as “cleft”) is enclosed by these two domains .…”