Optional
regionSingle region string like "1:100", "50:-1", "-100:-1"
Optional
regionsMultiple region strings
Optional
startStart position (alternative to region)
Optional
endEnd position (alternative to region)
Optional
bedBED file path to load regions from
Optional
bedBED regions to extract (alternative to bedFile)
Optional
gtfGTF file path to load features from
Optional
gtfGTF features to extract (alternative to gtfFile)
Optional
featureFeature type to filter (for GTF)
Optional
idPattern to match sequence IDs
Optional
idList of sequence IDs to extract
Optional
upstreamNumber of bases to include upstream of region
Optional
downstreamNumber of bases to include downstream of region
Optional
onlyExtract only flanking sequences, not the region itself
Optional
oneUse 1-based coordinates (default: true for biological convention)
Optional
strandStrand orientation for extraction
Optional
reverseReverse complement if on minus strand
Optional
circularTreat sequences as circular
Optional
includeInclude region coordinates in sequence ID
Optional
coordinateSeparator for coordinate suffix in ID
Optional
concatenateConcatenate multiple regions
Configuration options for subsequence extraction
Provides flexible ways to specify regions to extract, including simple coordinates, region files, and flanking sequences.