Figure 6. Stability of the pp-PA83 drug product. (A) Absorbance at 280 nm of pp-PA83 in saline with (♦) and without (■) Alhydrogel, as a function of time. (B) Tm of pp-PA83, determined by using the extrinsic fluorescence of SYPRO Orange, with (♦) and without (■) Alhydrogel, as a function of time.