| CPC A61K 9/1272 (2013.01) [A61K 9/5123 (2013.01); A61K 31/713 (2013.01); C12N 15/113 (2013.01); B82Y 5/00 (2013.01); C12N 2310/14 (2013.01); C12N 2320/30 (2013.01)] | 10 Claims | 
| 
               1. A lipid nanoparticle comprising: 
              (a) one or more nucleic acid molecules, wherein the nucleic acid molecules are mRNA molecules; 
                (b) cholesterol; 
                (c) DSPC; 
                (d) PEG-C-DMA; and 
                (e) a cationic lipid of formula: 
              ![]() or a salt thereof, wherein the molar percentage of total lipid for PEG-C-DMA, cationic lipid, cholesterol, and DSPC are as follows: 
            PEG-C-DMA: 1.485-1.515; 
                cationic lipid: 49.5-50.5; 
                cholesterol: 38.115-38.885; and 
                DSPC: 9.9-10.1. 
               |