Table 1.

The DLC of ELTN in PEG-PLA NPs with different preparation conditions.

Entry	Buffer	Lipid (DGPE)	DLC (%)
1	Citric acid buffer (pH 4.0)	+	11.8
2	PBS (pH 7.4)	+	0.3
3	HEPES (pH 7.4)	+	0.1
4	Citric acid buffer (pH 4.0)	-	5.6