In its reduced form it can be as simple as GCS .

以它的减少的形式它可以是一样简单的象GCS 。

The reducing potential of the NADH is utilized via the methemoglobin reductase pathway to maintain the iron in Hgb in its reduced form (Fe2+).

高铁血红蛋白还原酶途径利用了NADH的还原电位维持血红蛋白中铁元素的还原态（Fe2 +）。