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Table 1 Number of genes classified into each category according to the proportion of representation specificity thresholds used to classify the expressed sequence tag (EST) data

From: Ontogeny and phylogeny: molecular signatures of selection, constraint, and temporal pleiotropy in the development of Drosophila

  Specificity threshold
  None >Twofold >Fourfold >Eightfold Unique
Stage:      
Embryonic 3,256 2,171 1,342 959 725
Larval/pupal 1,358 739 392 205 100
Adult 2,566 1,834 1,427 1,259 1,191
Stage/tissue – gonads combined:      
Embryonic general 2,234 1,375 855 654 570
Embryonic gonads 905 520 293 117 39
Adult general 1,284 794 593 500 468
Adult gonads 1,688 1,154 817 623 402
Stage/tissue – gonads separated:      
Embryonic general 1,904 1,144 756 636 570
Embryonic gonads 775 415 221 103 39
Adult general 1,138 754 576 496 468
Adult ovary 1,057 503 202 92 27
Adult testis 1,388 1,011 779 617 367
  1. Larval/pupal represents the pooled larval and pupal stages. None: No threshold; >twofold, >fourfold, >eightfold: greater than twofold, fourfold, or eightfold proportion of representation relative to other stages, respectively; Unique: genes that are unique to a single developmental stage (see Methods).