SFF flowgram reads to UCSC nib converter

Convert a SFF flowgram reads sequence file to UCSC nib.

Convert from Convert to Choose your sequence file

Maximum file size: 50 MB. The file is checked before conversion.

SFF flowgram reads → UCSC nib

This output format holds exactly one sequence. Upload a file with a single record.
UCSC nib stores only the DNA letters A, C, G, T, and N. Gaps, ambiguity codes, RNA (U), and protein letters are rejected.
UCSC nib does not store record names, so the output has no identifier.
Flowgram signals and other SFF-specific data are not carried over.
The output keeps sequence letters but removes per-base quality scores.

About this conversion

The converter reads records in the input format and writes them in the output format. Data that the output format cannot store may be lost. The notes under the Convert file button list the important limits for this pair.

Run it with Biopython

For batch work, you can use Biopython's SeqIO.convert function. This pair needs no molecule type argument.

from Bio import SeqIO

count = SeqIO.convert("input.sff", "sff",
                      "output.nib", "nib")
print("Converted %i records" % count)

Sample input file: SFF flowgram reads

SFF flowgram reads is a binary format, so it cannot be shown as text. Download the sample file to try the converter.

Download sample (sample.sff, 17.2 KB)

Samples are small illustrative files. Some come from the Biopython test suite (see the project's sample notes); they are not real study data.

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