真核生物的钼酶使用一种独特的钼辅因子（MoCo），由一种叫做钼卟啉的叶黄素和催化活性金属钼组成MoCo是由前体Z经钼卟啉合酶合成的钼卟啉合酶的大小亚单位都是由这个基因通过重叠的开放阅读框编码的这些蛋白质最初被认为是由双顺反子转录本编码的。它们现在被认为是由单顺反子转录本编码的另外，这个基因座的剪接转录本已经被发现，它编码大的和小的亚单位。[由RefSeq提供，2008年7月]
Eukaryotic molybdoenzymes use a unique molybdenum cofactor (MoCo) consisting of a pterin, termed molybdopterin, and the catalytically active metal molybdenum. MoCo is synthesized from precursor Z by the heterodimeric enzyme molybdopterin synthase. The large and small subunits of molybdopterin synthase are both encoded from this gene by overlapping open reading frames. The proteins were initially thought to be encoded from a bicistronic transcript. They are now thought to be encoded from monocistronic transcripts. Alternatively spliced transcripts have been found for this locus that encode the large and small subunits. [provided by RefSeq, Jul 2008]