| Name | Description | Type | Package | Framework |
| Adenine | A class representing the Adenine Base. | Class | org.jscience.biology.bases | JScience |
| Cytosine | A class representing the Cytosine Base. | Class | org.jscience.biology.bases | JScience |
| Guanine | A class representing the Guanine Base. | Class | org.jscience.biology.bases | JScience |
| Thymine | A class representing the Thymine Base. | Class | org.jscience.biology.bases | JScience |
| Uracil | A class representing the Uracil Base. | Class | org.jscience.biology.bases | JScience |