Clarify MLE score

Author: aaronkw

docs/deepsea.rst

@@ -74,7 +74,7 @@ Variant scores
   .. math::
       -log10(DIS e-value_{feature})
 
-* **Mean -log e-value (MLE)**: For each predicted regulatory feature effect of a variant, we calculate a 'feature e-value' based on the empirical distribution of that feature for gnomAD variants (see above). The MLE score of a variant is
+* **Mean -log e-value (MLE)**: For each predicted regulatory feature effect (:math:`abs(p_{alt}-p_{ref}`)) of a variant, we calculate a 'feature e-value' based on the empirical distribution of that feature's effects among gnomAD variants (see above Regulatory feature scores: e-value). The MLE score of a variant is
 
   .. math::
       \sum -log10(e-value_{feature}) / N