Annotation DB Features

Genomic annotations can be visualised directly from an annotation database, without needing a sequence object. This is useful for exploring annotations loaded from GFF or GenBank files.

Drawing features from an annotation database

We load annotations for Caenorhabditis elegans chromosome I from a GFF file.

Drawing all features for a region

We can draw features for a specific region by providing coordinate bounds.

Note

This produces the same visual output as seq.get_drawable(biotype=...), but without loading the sequence data.

Using the range slider

By default, figures include an interactive range slider below the main plot. Drag the handles or select a region on the slider to zoom into a portion of the sequence. The x-axis label indicates the slider.

Note

Hover over filled shapes to see feature details (name, biotype, coordinates, strand).

Filtering by biotype

We can select specific feature types to display.

Disabling the range slider for static images

The range slider is included when saving figures as images. To produce a clean static image, disable the controls with show_controls=False.