readme.v33t0

序列对齐 Compare a protein sequence to a protein sequence database or a DNA sequence to a DNA sequenc

changed to allow both Blast1.4 and Blast2.0 databases to be read.  In
addition, Makefile.common now includes an option to link both
ncbl_lib.o and ncbl2_lib.o, which provides support for both libraries.
However, Blast1.4 support has not been tested.

The Makefile structure has been improved.  Each architecture specific
Makefile (Makefile.alpha, Makefile.linux, etc) now includes
Makefile.common.  Thus, changes to the program structure should be
correct for all platforms.  "map_db" and "list_db" are not made with
"make all".

The database reading functions in nxgetaa.c can now return a database
length of 0, which indicates that no residues were read.  Previously,
0-length sequences returned a length of 1, which were ignored.
Complib.c and comp_thr.c have changed to accommodate this
modification.  This change was made to ensure that each residue,
including the last, of each sequence is read.

Corrected bug in nxgetaa.c with FASTA format files with very long
(>512 char) definition lines.

(2) (September 20, 1999) BLAST2 format databases supported

This release supports NCBI Blast2.0 format databases, using either
conventional file reading or memory mapped files.  The Blast2.0 format
can be read very efficiently, so there is only a modest improvement in
performance with memory mapping.  The decision to use mmap()'ed files
is made at compile time, by defining USE_MMAP.  My thanks to Eamonn
O'Toole of DEC/Compaq, and Daryl Madura of Sun Microsystems, for
providing mmap()'ed modifications to fasta3.  On my machines, Blast2.0
format reduces search time by about 30%.  At the moment, ambiguous DNA
sequences are not decoded properly.

(3) (September 30, 1999) A new statistical estimation option is
available.  -z 2 has been changed from ln()-scaling, which never
should have been used, to scaling using Maximum Likelihood Estimates
(MLEs) of Lambda and K.  The MLE estimation routines were written by
Aaron Mackey, based on a discussion of MLE estimates of Lambda and K
written by Sean Eddy.  The MLE estimation examines the middle 95% of
scores, if there are fewer than 10000 sequences in the database;
otherwise it excludes (censors) the top 250 scores and the bottom 250
scores.  This approach seems to effectively prevent related sequences
from contaminating the estimation process.  As with -z 1, -z 12 causes
the program to generate a shuffled sequence score for each of the
library sequences; in this case, no censoring is done.  If the
estimation process is reliable, Lambda and K should not vary much with
different queries or query lengths.  Lambda appears not to vary much
with the comparison algorithm, although K does.

(4) Minor changes include fixes to some of the alignment display routines,
individual copies of the pstruct structure for each thread, and some
changes to ensure that every last residue in a library is available
for matching (sometime the last residue could be ignored).  This
version has undergone extensive testing with high-throughput sequences
to confirm that long sequences are read properly.  Problems with
fastf3/fasts3 alignment display have also been addressed.

>>August 26, 1999 (no version change - not released)

Corrected problem in "apam.c" that prevented scoring matrices from
being imported for [t]fasts3/[t]fastf3.

>>August 17, 1999
 --> v32t07

Corrected problem with opt_cut initialization that only appeared
with pvcomp* programs.

Improved calculation of FASTA optcut threshold for DNA sequence
comparison for match scores much less than +5 (e.g. +3).  The previous
optcut theshold was too high when the match penalty was < 4 and
ktup=6; it is now scaled more appropriately.

Optcut thresholds have also been raised slightly for
fastx/y3/tfastx/y3.  This should improve performance with minimal
effects on sensitivity.

>>July 29, 1999
(no version change - date change)

Corrected various uninitialized variables and buffer overruns
detected.

>>July 26, 1999 - new distribution
(no version change - v32t06, previous version not released)

Changed the location of "(reverse complement)" label in tfasta/x/y/s/f
programs.

Statistical calculations for tfasta/x/y in unthreaded version
corrected.  Statistical estimates for threaded and unthreaded versions
of the tfasta/x/y/s/f programs should be much more consistent.

Substantial modifications in alignment coordinate calculation/
presentation.  Minor error in fastx/y/tfastx/y end of alignment
corrected.  Major problems with tfasta alignment coordinates
corrected.  tfasta and tfastx/y coordinates should now be consistent.

Corrected problem with -N 5000 in tfasta/x/y3(_t) searches encountered
with long query sequences.

Updated pthr_subs.c/Makefile.linux to increase the pthreads stacksize
to try to avoid "cannot allocate diagonal arrays" error message.
Pthreads stacksize can be changed with RedHat 6.0, but not RedHat 5.2,
so Makefile.linux uses -DLINUX5 for RedHat5.* (no pthreads stack size).
I am still getting this message, so it has not been completely
successful.  Makefile.linux now uses -DALLOCN0 to avoid this problem,
at some cost in speed.

The pvcomp* programs have been updated to work properly with
forward/reverse DNA searches.  See readme.pvm_3.2.

>>July 7, 1999 - not released
 --> v32t06

Corrected bug in complib.c (fasta3, fastx3, etc) that caused core
dumps with "-o" option.

Corrected a subtle bug in fastx/y/tfastx/y alignment display.

>>June 30, 1999 - new distribution
(no version change)

Corrected doinit.c to allow DNA substitution matrices with -s matrix
option.

Changed ".gbl" files to ".h" files.

>>June 2 - 9, 1999 - new distribution
(no version change)

Added additional DNA lambda/K/H to alt_param.h.  Corrected some
other problems with those table. for the case where (inf,inf)
gap penalties were not included.

Fixed complib.c/comp_thr.c error message to properly report filename
when library file is not found.

Included approximate Lambda/K/H for BL80 in alt_parms.h.
BL80 scoring matrix changed from 1/3 bit to 1/2 bit units.

Included some additional perl files for searchfa.cgi, searchnn.cgi
in the distribution (my-cgi.pl, cgi-lib.pl).

>>May 30, 1999, June 2, 1999 - new distribution
(no version number change)

Added Makefile.NetBSD, if !defined(__NetBSD__) for values.h.  Changed
zs_to_E() and z_to_E() in scaleswn.c to correctly calculate E() value
when only one sequence is compared and -z 3 is used.

>>May 27, 1999
(no version number change)

Corrected bug in alignment numbering on the % identity line
	27.4% identity in 234 aa (101-234:110-243)
for reverse complements with offset coordinates (test.aa:101-250)

>>May 23, 1999
(no version number change)

Correction to Makefile.linux (tgetaa.o : failed to -DTFAST). 

>>May 19, 1999
(no version number change)

Minor changes to pvm_showalign.c to allow #define FIRSTNODE 1.
Changes to showsum.c to change off-end reporting.  (Neither of these
changes is likely to affect anyone outside my research group.)

>>May 12, 1999
 --> v32t05

Fixed a serious bug in the fastx3/tfastx3 alignment display which
caused t/fastx3 to produce incorrect alignments (and incorrectly low
percent identities).  The scores were correct, but the alignment
percent identities were too low and the alignments were wrong.

Numbering errors were also corrected in fastx3/tfastx3 and
fasty3/tfasty3 and when partial query sequences were used.

>>May 7, 1999

Fixed a subtle bug in dropgsw.c that caused do_work() to calculate
incorrect Smith-Waterman scores after do_walign() had been called.
This affected only pvcompsw searches with the "-m 9" option.

>>May 5, 1999

Modified showalign.c to provide improved alignment information that
includes explicitly the boundaries of the alignment.  Default
alignments now say:

Smith-Waterman score: 175;  24.645% identity in 211 aa overlap (5:207-7:207)

>>May 3, 1999

Modified nxgetaa.c, showsum.c, showbest.c, manshowun.c to allow a
"not" superfamily annotation for the query sequence only.  The
goal is to be able to specify that certain superfamily numbers be
ignored in some of the search summaries.  Thus, a description line
of the form:

>GT8.7 | 40001 ! 90043 | transl. of pa875.con, 19 to 675

says that GT8.7 belongs to superfamily 40001, but any library
sequences with superfamily number 90043 should be ignored in any
listing or summary of best scores.

In addition, it is now possible to make a fasta3r/prcompfa, which is
the converse of fasta3u/pucompfa. fasta3u reports the highest scoring
unrelated sequences in a search using the superfamily annotation.
fasta3r shows only the scores of related sequences.  This might be
used in combination with the -F e_val option to show the scores
obtained by the most distantly related members of a family.

>>April 25, 1999

 -->v32t04 (not distributed)

Modified nxgetaa.c to remove the dependence of tgetaa.o on TFASTA
(necessary for a more rational Makefile structure).  No code changes.

>>April 19, 1999

Fixed a bug in showalign.c that displayed incorrect alignment coordinates.
(no version number change).

>>April 17, 1999

 --> v32t03

A serious bug in DNA alignments when the sequence has been broken into
multiple segments that was introduced in version fasta32 has been
fixed.  In addition, several minor problems with -z 3 statistics on
DNA sequences were fixed.

Added -m 9 option, which unfortunately does different things in
pvcompfa/sw and fasta3/ssearch3.  In both programs, -m 9 provides the
id's of the two sequences, length, E(), %_ident, and start and end of
the alignment in both sequences.  pvcompfa/sw provides this
information with the list of high scoring sequences.  fasta3/ssearch3
provides the information in lieu of an alignment.

>>March 18, 1999

 --> v32t02

Added information on the algorithm/parameter description line to
report the range of the pam matrices.  Useful for matrices like
MD_10, _20, and _40 which require much higher gap penalties.

>>March 13, 1999 (not distributed)

 --> v32t01 

 -r results.file  has been changed to -R results.file to accomodate
 DNA match/mismatch penalties of the form: -r "+1/-3".

>>February 10, 1999

Modify functions in scalesw*.c to prevent underflow after exp() on
Alpha Linux machines.  The Alpha/LINUX gcc compiler is buggy and
doesn't behave properly with "denormalized" numbers, so "gcc -g -m
ieee" is recommended.

Add "Display alignments also (y/n)[n] "

pvcomplib.c again provides alignments!!  In addition, there is a
new "-m 9" option, which reports alignments as:

>>>/home/wrp/slib/hlibs/hum0.aa#5>HS5 gi:1280326 T-cell receptor beta chain 30 aa, 30 aa vs /home/wrp/slib/hlibs/hum0.seg library
HS5         	  30	HS5         	  30	1.873e-11	1.000	  30	   1	  30	   1	  30
HS5         	  30	HS2249      	  40	1.061e-07	0.774	  31	   1	  30	   7	  37
HS5         	  30	HS2221      	  38	1.207e-07	0.833	  30	   1	  30	   7	  35
HS5         	  30	HS2283      	  40	1.455e-07	0.774	  31	   1	  30	   7	  37
HS5         	  30	HS2239      	  38	1.939e-07	0.800	  30	   1	  30	   7	  35

where the columns are:

query-name      q-len   lib-name      lib-len   E()             %id    align-len  q-start q-end   l-start l-end

>>February 9, 1999

Corrected bug in showalign.c that offset reverse complement alignments
by one.

>>Febrary 2, 1999

Changed the formatting slightly in showbest.c to have columns line up better.

>>January 11, 1999

Corrected some bugs introduced into fastf3(_t) in the previous version.

>>December 28, 1998

Corrected various problems in dropfz.c affecting alignment scores
and coordinates.

Introduced a new program, fasts3(_t), for searching with peptide
sequences.

>>November 11, 1998

  --> v32t0

Added code to correct problems with coordinate number in long library
sequences with tfastx/tfasty.  With this release, sequences should be
numbered properly, and sequence numbers count down with reverse
complement library sequences.

In addition, with this release, fastx/y and tfastx/y translated
protein alignments are numbered as nucleotides (increasing by 3,
labels every 30 nucleotides) rather than codons.