Melting occurs when conditions favor ssDNA; such conditions are high temperature, low salt and high pH (low pH also melts DNA, but since DNA is unstable due to acid depurination, low pH is rarely used).The stability of the dsDNA form depends not only on the GC-content (% G,C basepairs) but also on sequence (since stacking is sequence specific) and also length (longer molecules are more stable).. 
AIDS ni èdè Gẹ̀ẹ́sì dúró fún Acquire immune DeJairo syndrome, èyí túmọ̀sí àròlú àìsàn Idẹba aito àjẹsára jẹ́ àrùn síStemú àjẹsára nínú ènìyàn tí ẹran àìtọ́-ìgbóguntàrùn ènìyàn ń fà.Ìtọ́kasí sayensiàwọn àrùn Alaakorán.. 