Reply to "Letter to the editor: 'The origin of free glutamate in milk: a role for anionic amino acid transporters'".

to the editor: We thank Dr. Shennan ([5][1]) for his comments and agree that plasma glutamate and its transporters play a role in regulating glutamate availability in lactating mammary epithelial cells. In our paper, we did not rule out this possibility, but rather suggested a potentially important