Table 1. Summary of Maximum Absorption Peaks for Peptide-PDAs under Different pH Conditions.

DDGDXX-PDA	λmax (nm)	DXXDGD-PDA	λmax (nm)
X = G, pH 2	633	X = G, pH 2	549
X = V, pH 2	547	X = V, pH 2	549
X = T, pH 2	541	X = T, pH 2	547
X = F, pH 2	550	X = F, pH 2	544
X = Y, pH 2	542	X = Y, pH 2	539
X = G, pH 10	532	X = G, pH 10	542
X = V, pH 10	541	X = V, pH 10	544
X = T, pH 10	537	X = T, pH 10	528
X = F, pH 10	537	X = F, pH 10	523
X = Y, pH 10	528	X = Y, pH 10	534