Extracting Sequences from Trace Files
			      Simon Dear
			(sd@mrc-lmb.cam.ac.uk)
			   19 November 1992


To obtain the sequence from a trace file, the program 'trace2seq' can
be used.  It can operate on several trace file sources: ABI 373A
sample files, Pharmacia A.L.F. traces (created by 'alfsplit') and SCF
traces (created by 'makeSCF' or from other sources).  The sequence is
stored in a file. A header, required for assembly into the sequence
assembly programs xdap and xbap, may optionally be produced.

Usage is as follows:

	trace2seq (-ABI | -ALF | -SCF) {tracefilename}
		  -output {outputfilename}
		  [-header (0|1)] [-raw filename]

By default, a header is not produced. To be included, the -header
option with argument 1, or the -raw option should be used. The -raw
option allows the trace file name, that forms part of the header, to
be explicitly specified. By default the trace file name in the header
is that from from which the sequence came.

An example:

To output the sequence from the ABI 373A trace 'trace.abi', with the
inclusion of a header, into a file called 'abi.seq':

	trace2seq -ABI trace.abi -output abi.seq -header 1


After the operation, 'abi.seq' will contain:

	;   827     0   827ABI trace.abi
	AG--TGCATGCCTGCAGGTCGACTCTAGAGG-TCCCGGGGTACCGAGCTC
	GAATTC-TAATCATGGTCATAGCTGT-TCCTGTGTGAAATT-TTATCCGC
	TCACAATTCCACACAACATACGAGCCGGAAGCATAAAGTGTAAAGCCTGG
	GGTGCCTAATGAGTGAGCTAACTCACATTAATTGCGTTGCGCTCACTGCC
	CGCTTTCCAGTCGGGAAACCTGTCGTGCCAGCTGCATTAATGAATCGGCC
	AACGCGCGGGGAGAGGCGGTTTGCGTATTGGGCGCCAGGGTGGTTTTA-T
	TTTCACCAGTGAGACGGGCAACAGCTGATTGCCCTTCACCGCCTGGCCCT
	GAGAGGAGTTGCAGCAAGCGGTCCACGCT-GTT-TGCCCCAGCAGGCG-A
	AATCCTGTTTTGATGGTTGGTTCC-GAAATCGGCAAAAATCCCTTATAAA
	TTC-AAAGGATAGG-CCGAG--TGGGG-T-AGTTTTT-TTTCCGG-TTTG
	AACAAGT-GTTCCCCTGTT-AAAGGA-CGTGGG--TC-AACCGTT-AAA-
	GGG-G--AA--CCGTTTT-TTTATGGG--A--GGC---TT-C--GTTCCG
	TTA-CCTG-TT-AA-GTTTTTTTGGGGTT-TGG-G-CGTAAG-GCT-AAT
	-GGACC-TAATGG-GGCCC-GATTTTGGGTT-TGGGGGAAGCGGA--GAC
	GG-GG-TG-GTGGGTGTAT-GGA-GTC--G-TTAGG-TGGGAAT--T-GG
	TG--T-GG--ATCG-TT-G--T--GGTTTTT-GGT-T-TAGGGGTGGTTT
	--GTGTTTTTT-GTGT-TTG--TT--T