Table 1

HAPPI database protein interaction data quality grade and coverage.

Star Grade

Quality Description

h-score range

Interaction Count

1

noisy and uncertain interactions

[0, 0.25)

546,136

2

low-confidence interactions

[0.25, 0.45)

378,300

3

average-confidence interactions

[0.45, 0.75)

142,071

4

decent-confidence interactions

[0.75, 0.90)

67,462

5

high-confidence interactions

[0.90, 1)

75,494

Chen et al. BMC Genomics 2009 10(Suppl 1):S16   doi:10.1186/1471-2164-10-S1-S16