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Table 2 Classification of interactions based on the evolutionary profiles of interaction partners.

From: The impact of horizontal gene transfer in shaping operons and protein interaction networks – direct evidence of preferential attachment

Category of interacting partners

Number of Interactions

Core to Core

3981 (74.0%)

Non-core to Non-core

35 (0.6%)

HGT to HGT

24 (0.4%)

Core to Non-core

606 (11.2%)

Core to HGT

687 (12.8%)

Non-core to HGT

55 (1.0%)

Total Interactions

5388 (100%)