Table 2 Stepwise filtering of pairs.

Pairs found in the whole training set in all distance intervals

~37000

Pairs found in the "seed" set in all distance intervals (step 2 on the fig. 1)

~400

"Seed" pairs in more than 80% of the training set (step 4 on the fig. 1)

~180

"Seed" pairs in more than 80% of the training set and less than 40% of the negative training set (step 6 on the fig. 1)

4