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. 2022 Jan 3;40(7):1026–1029. doi: 10.1038/s41587-021-01147-4

Table 1.

Example of a SLOW5 ASCII file with a single read group

#slow5_version 1.0.0
#num_read_groups 1
@asic_id 0004A30B00232BEC
@exp_start_time 2020-01-01T00:00:00Z
@flow_cell_id FAH00000
@run_id 855cdb
#char* uint32_t double double double double uint64_t int16_t*
#read_id read_group digitisation offset range sampling_rate len_raw_signal raw_signal
read0 0 8192 6 1467.6 4000 123456 498,492,…
read1 0 8192 5 1467.6 4000 2000 491,491,…
readN 0 8192 3 1467.6 4000 3000 400,400,…

A SLOW5 file contains a header (rows with ‘@’ and ‘#’ prefixes) that stores metadata regarding the contents of the file and the ONT experiment(s) contained within, followed by data records (rows with no prefixes) for sequencing reads, with one read per line. SLOW5 format uses tabs (‘\t’) and newlines (‘\n’) as column and row delimiters, respectively. Complete format specifications are provided in Supplementary Note 3.