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 ReadonlystatsComputed sequence statistics
ReadonlyformatReadonlyqualityQuality scores as ASCII string - required for FASTQ
ReadonlyqualityQuality encoding system detected or specified - required for FASTQ
Optional ReadonlyqualityParsed numeric quality scores (lazy-loaded)
Optional ReadonlyqualityComputed quality statistics
FASTQ sequence with quality scores and statistics Format:
Id
description\nsequence\n+\nquality