GMAT Sentence Correction (SC) | Having extracted the BRCA1 and BRCA2

Here is myapproach!

Having extracted the BRCA1 and BRCA2 genes from human DNA to isolate them as a research subject, Myriad Genetics feels it is entitled to its patent on the new DNA compound , but petitioners in a Supreme Court case are contestingit on the grounds that a company cannot copyright nature.

First and foremost, we must make clear whatit in non-underlined portion refers to.

We know thatpetitioners ... are contesting it . I firmly believepetitioners have nothing to do with DNA
...

---