The fluorescence intensities (λ = 510
nm) of 10 μM MHF upon addition of 100 μM
physiological important amino acids (Glu, Asp, His, Arg, Lys, Gln,
Asn, Tyr, Thr, Ser, Cys, Gly, Met, Trp, Phe, Pro, Ile, Leu, Val, and
Ala) in MeCN-H2O (1:1, v/v) solution with 10 mM HEPES buffer.