| Code | Name | Deposits | Targets | Ligand Type |
|---|---|---|---|---|
| KAN | 8 | 3 | biological | |
| KAN | 1 | 1 | crystallization | |
| KCX | 10 | 7 | modified residue | |
| KHL | 1 | 1 | biological | |
| KNA | 1 | 1 | biological | |
| KP3 | 1 | 1 | biological | |
| KWA | 6-MNA | 1 | 1 | biological |
| L30 | unknown | 2 | 1 | biological |
| LI | lithium ion | 1 | 1 | crystallization |
| LI | lithium ion | 1 | 1 | other |
| LIG | 3-pyridin-4-yl-2,4-dihydro-indeno[1,2-.c.]pyrazole | 3 | 3 | biological |
| LIG | 3-pyridin-4-yl-2,4-dihydro-indeno[1,2-.c.]pyrazole | 2 | 2 | crystallization |
| LLL | 2 | 2 | biological | |
| LLP | PYRIDOXAL-5''-PHOSPHATE | 1 | 1 | biological |
| LLP | PYRIDOXAL-5''-PHOSPHATE | 9 | 5 | modified residue |
| LMR | (2s)-2-hydroxybutanedioic acid | 1 | 1 | biological |
| LMR | (2s)-2-hydroxybutanedioic acid | 1 | 1 | crystallization |
| LMR | (2s)-2-hydroxybutanedioic acid | 2 | 1 | other |
| LMT | dodecyl-beta-d-maltoside | 1 | 1 | crystallization |
| LN0 | 1 | 1 | biological |