ExtractRegion #

Extract a fixed position region.

[[step]]
    action = "ExtractRegion"
    start = 5
    length = 8
    segment = "read1" # Any of your input segments
    out_label = "umi"

This transformation extracts a fixed-length region from the specified read at a given position and stores it as a tag.

Use ExtractRegions if your region is actually multiple regions (possibly from different segments).

If the read is shorter than requested, the region will be shorter (and might be of varying length).