It is no less..... than are??
“The chemical structure of native human genes is a product of nature, and it is no less a product of nature when that structure is ‘isolated’ from its natural environment than are cotton fibers that have been separated from cotton seeds or coal that has been extracted from the earth,” the brief said.
In this sentence, why it is written as 'than are cotton fibers'? Grammatically, I can't understand why subject and verb is reversed in that part.