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@jebard
Created October 1, 2025 18:22
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BCL Convert sample sheet and bcl2fastq command for ATAC data (pasted below).
Example BCL Convert Sample Sheet:
[Header],,
FileFormatVersion,2,
RunName,20240307_HH_AT209_Deep_ATAC,
InstrumentPlatform,NextSeq500/550,
InstrumentType,NextSeq550,
,,
[Reads],,
Read1Cycles,50,
Read2Cycles,50,
Index1Cycles,8,
Index2Cycles,60,
,,
[BCLConvert_Settings],,
OverrideCycles,Y50;I8;U60;Y50,
CreateFastqForIndexReads,1,
TrimUMI,0,
,,
[BCLConvert_Data],,
Sample_ID,index,index2
AT209_fresh_T0_QB,TAAGGCGA,
AT209_frozen_T0_QB,CGTACTAG,
AT209_fresh_T0_HH,AGGCAGAA,
AT209_frozen_T0_HH,TCCTGAGC,
AT209_fresh_24h,GGACTCCT,
AT209_frozen_24h,TAGGCATG,
AT209_fresh_48h,CTCTCTAC,
AT209_frozen_48h,CAGAGAGG,
AT209_fresh_72h,GCTACGCT,
AT209_frozen_72h,CGAGGCTG,
Example bcl2fastq Command:
bcl2fastq --input-dir BaseCalls --runfolder-dir rRunfolder --sample-sheet SampleSheet.csv --output-dir Demultiplexed_Data --interop-dir Demultiplexed_Data/interop_path --use-bases-mask y*,I8n*,y*,y* -p 20 --ignore-missing-positions --ignore-missing-filter --ignore-missing-bcls --create-fastq-for-index-reads
Run setup is: 51-8-60-51
Our demux output generated: R1, I1,R2, R3
R1 is Read1
I1 is i7 index sequence used for the demux
R2 associates with the i5 index read (Based on the requirement rename this file to I2)
R3 is Read2
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