Mouse BAC Ends Quality Assessment and Sequence Analyses

Table 1.

TIGR Mouse BAC End Sequencing Efforts (June 27, 2001)

Library RPCI-23 RPCI-24 Total
Sequencing success rate (%) 83 79 81
Mouse BAC end sequences (mBESs) 274277 174957 449234
Clones with ≥1 end and coverage 154795, 10X 102524, 5.3X 257318, 15.3X
Paired-end clones and coverage 119483, 77%, 7.9X  72433, 71%, 3.7X 191916, 75%, 11.6X
Edited read length, avg. ± S.D. bp 466 ± 162 515 ± 188 485 ± 174
Total bases, Mb 128 90 218
Avg. Q20 bases after trimming, bp 387 ± 154 438 ± 179 406 ± 166
Repeat contents, %mBES and %bases 63 & 36.5 66 & 37.5 64 & 37
Clones with ≥100 unique Q20 bases 65% 66% 66%
%mBESs matching mouse ESTs 2.2 4.5 3
Clone tracking accuracy >95% >95% >95%
  • Percent of sequencing attempts that yielded reads with an overall error rate <2.5%, an edited read length >100 bp, and free of E. coli and vector sequences.

  • Clones with at least one end sequence. Clone coverage was calculated assuming an average insert size of 197 kb for PRCI-23 library and 155kb for PCRI-24 library, and a genome size of 3 Gb.

  • Clones with both T7 and Sp6 end sequences (pairs). Clone coverage by pairs was calculated as described above. Total number of pairs, % of pairs in the database, and their coverage are shown.

  • Read length after sequences were trimmed. The average and standard deviation (S.D.) are shown.

  • Average number of bases with phred QV ≥ 20 per sequence after sequences were trimmed. The average and S.D. are shown.

  • Percent of mBESs that contained repeats and percent of bases that were repeats, analyzed by RepeatMasker.

  • Percent of paired-end clones that had at least one end with ≥100 bp contiguous unique Q20 bases.

  • Percent of mBESs that were associated with the correct clone identifiers.

This Article

  1. Genome Res. 11: 1736-1745

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