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Table 2 Summary of survey results

From: A survey of orphan enzyme activities

  Number Proportion
Total number of putative orphans 1,356  
Number required to achieve 95% significance 180 13.3%
Number orphans evaluated 228 16.8%
Out of 228 orphans:   
   Number of artifactual orphans 41 18.0%
   Number of valid orphans 187 82.0%
   Max. number of salvageable orphans (all rankings) 57 25.0%
Out of 57 salvageable orphans: Number Proportion
   Excellent 9 15.8%
   Good 23 40.4%
   Marginal 9 15.8%
   Poor 16 28.1%
   Bacterial salvageable orphans 26 45.6%
   Eukaryotic salvageable orphans 31 54.4%
  1. The survey was designed to achieve a maximum sampling error of 5%, 19 times out of 20. This corresponds to a minimum sample size of ~80 orphans. A total of 228 orphans were in fact surveyed. In a number of cases more than one instance of an orphan activity was evaluated because the activity was reported in more than one species. Consequently, 286 instances were evaluated.