Ligand Similarity Complements Sequence, Physical Interaction, and Co-Expression for Gene Function Prediction.

As with sequence similarity, whereas there is a significant trend for proteins that are among the top 0.5% of co-expressing pairs to share related ligands, (χ 2 = 1.3e3, p < 2.2e-16), pragmatically the effect size is marginal and only 9.3% of the top 15% of co-expressed pairs show any SEA interactions at all ( Fig 1B ).

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