Table 4.

Tryptophan Fluorescence Emission of PSPF Peptides at pH 7.4 and 5.5 with and without Lipid Vesicles

peptide	pH 7.4				pH 5.5
	λmax (nm)		Δλmax (nm)a	% intensity increaseb	λmax (nm)		Δλmax (nm)a	% intensity increaseb
	0 μM lipid	200 μM lipid			0 μM lipid	200 μM lipid
PSPF-DQA	352	351	−1	32	348	347	−1	38
PSPF-DQG	354	353	−1	18	350	358	+8	33
PSPF-DKA	354	353	−1	18	349	358	+9	38
PSPF-DKG	355	351	−4	36	350	347	−3	38
PSPF-EQA	352	352	0	6	349	348	−1	21
PSPF-EQG	355	354	−1	15	349	346	−3	42
PSPF-EKA	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
PSPF-EKG	354	352	−2	28	350	347	−3	52
PSPF-HQA	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
PSPF-HQG	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
PSPF-HKA	N/A	N/A	N/A	N/A	349	347	−2	34
PSPF-HKG	N/A	N/A	N/A	N/A	351	341	−10	72

^a

Calculated as follows:

$$\mathrm{\Delta }{\lambda }_{max}={\lambda }_{max}^{200\mu \mathrm{M}\text{lipid}}-{\lambda }_{max}^{0\mu \mathrm{M}\text{lipid}}$$

^b

Calculated as follows:

$$\%\text{intensity}\text{increase}=\left(\frac{{\text{intensity}}^{200\mu \mathrm{M}\text{lipid}}-{\text{intensity}}^{0\mu \mathrm{M}\text{lipid}}}{{\text{intensity}}^{0\mu \mathrm{M}\text{lipid}}}\right)\times 100\%$$