Figure 2

Release of small fluorescent molecules and peptides from the PMGI nanofibers. The 2 fluorescent small molecules, fluorescein and porphine (a), and the 3 peptides (6X Lys, 6X Glu, and 6X Leu) containing FITC-labeled lysine at each carboxy terminus were used to dope the nanofibers with which polystyrene dishes were coated. The dishes were incubated at 37°C in PBS. The residual amounts of the fluorescent small molecules (b) or fluorescent peptides (c) in the nanofibers were quantified using a fluorescent microscope. The fluorescence intensity of each nanofiber substratum on the first day was defined as 100 %. A.U. indicates arbitrary unit. Error bars: SEM, n = 5.