ReadonlyidSequence identifier (required, but may be empty string in malformed data)
Optional ReadonlydescriptionOptional description/comment line
ReadonlysequenceThe actual sequence data
ReadonlylengthCached sequence length for performance
Optional ReadonlylineOriginal line number where this sequence started (for error reporting)
Optional ReadonlyqualityQuality scores as ASCII string (present if FASTQ)
Optional ReadonlyqualityQuality encoding system (present if FASTQ)
Optional ReadonlystatsComputed sequence statistics
FASTA/FASTQ unified representation Encompasses all information from both text-based formats Extends AbstractSequence to include quality information when present