Dimensions of hydrated proton, small chemical molecules, and proteins
| Molecule | Mw (g/mol) | XYZ dimensions (nm)a | Database accession number |
|---|---|---|---|
| Hydrated proton (H3O+) | 19 | 0.1 (O-H) × 0.2 (H-H) × 0.2 (H-H) | 13968-08-6 (CAS) |
| HEPES | 238 | 0.5 × 1.0 × 0.3 | 7365-45-9 (CAS) |
| FM 4-64b | 608 | 0.9 × 3.0 × 0.3 | |
| Human ANP | ∼3 × 103 | 2.1 × 2.1 × 1.1 | 1ANP (PDB) (Cunningham et al., 1994) |
| GFP mutant | ∼27 × 103 | 3.8 × 5.1 × 3.6 | 2EMO (PDB) (Palm et al., 1997) |
| Human prolactin | ∼23 × 103 | 5.2 × 6.4 × 3.3 | 1RW5 (PDB) (Teilum et al., 2005) |
O-H, Oxygen atom to hydrogen atom; H-H, between two hydrogen atoms; CAS, Chemical Abstracts Service numbers for small chemical molecules; PDB, Protein Data Bank numbers for proteins; ANP, atrial natriuretic peptide; GFP, green fluorescent protein.
↵aXYZ dimensions of molecules were measured with a Pymol Molecular Graphics System.
↵bThree-dimensional model of FM 4-64 was obtained with MDL ISIS/Draw (version 2.5) and a Pymol Molecular Graphics System.