Complex sentence: A 2010 study has shown that between an estimated 4% to 6% of the genome in Melanesians (e.g. Papua New Guinean and Bougainville Islander) derives from Denisovans, while no other Eurasians or Africans displayed contributions of Denisovan genes.
Split into simpler sentences: A 2010 study has shown that Melanesians (e.g. Papua New Guinean and Bougainville Islander) share relative more alleles with Denisovans when compared to other studied Eurasians and Africans. It estimated that 4% to 6% of the genome in Melanesians derives from Denisovans, while no other studied Eurasians or Africans displayed contributions of the Denisovan genes.