PHILADELPHIA — Asayansi a pa yunivesite ya Pennsylvania’s Perelman School of Medicine apanga njira yatsopano yopangira ma chromosome opangidwa ndi anthu (HACs) omwe angasinthire kusintha kwa ma gene therapy ndi ntchito zina za biotechnology. Kafukufukuyu, wofalitsidwa mu Science, akufotokoza njira yomwe imapanga bwino ma HAC amtundu umodzi, kudutsa chopinga chomwe chalepheretsa kupita patsogolo pantchitoyi kwazaka zambiri.