One of the reviewers actually came to Piims and retrieved some of the data that went into the paper to make the point that we should comment on the Mg effect of the mutation. Specifically, the reviewer pointed out that the mutation doesn't affect Mg, even though it affects Ca. They even included a figure of the data! I am posting the figure here, Blue is the mutant, and pink is the wild-type.
Just another reason to put all your data out there. We thank the reviewer for the helpful suggestions.
ps: Though we are collecting data about who visits our website, we don't collect data about what they search, so the kind reviewer is still anonymous to us.