Figure 1: NKCC1 and AQ1 in developing and adult dura. (A) NKCC1 immunoreactivity (brown) in capillaries of a 21 wk fetal dura. (B) AQ1 immunoreactivity in capillaries of a 21 wk fetal dura. (C) NKCC1 immunoreactivity in capillaries of newborn dura. (D) AQ1 immunoreactivity in capillaries of newborn dura. (E) NKCC1 immunoreactivity in capillaries in 38 year old dura. (F) AQ1 immunoreactivity in capillaries of 38 year old’s dura (Hematoxylin counterstain and diaminobenzidine chromagen; original magnification 400x).