Fig. 1.

Schematic representation of NOS isoform expression in the placenta. Changes in total NOS (blue background), eNOS (red line) and iNOS (green line) expression in placenta throughout pregnancy. Graph shows NOS levels described for different species (i.e. human, mouse, porcine, rat and sheep) determined by enzymatic activity and/or protein expression. Data derived from Refs. [15–17, 19, 21–24, 184]. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)