| AnnotationAdaptor | integrates SeqFeatureIs annotation |
| Collection | A container class for SeqFeatures
suitable for performing operations such as finding features within a
range, that match a certain feature type, etc. |
| CollectionI | An interface for a collection of SeqFeatureI objects. |
| Computation | Computation SeqFeature |
| FeaturePair | hold pair feature information e.g. blast hits |
| Generic | Generic SeqFeature |
| PositionProxy | handle features when truncation/revcom sequences span a feature |
| Primer | Primer Generic SeqFeature |
| Similarity | A sequence feature based on similarity |
| SimilarityPair | Sequence feature based on the similarity
of two sequences. |