High 260/280 ratio after RNA extraction from primary macrophage cell culture?

I extracted RNA using the Trizol/chloroform method from primary macrophage that was plated with FBS and P/S. The 260/280 ratios from nanodrop were as high as 6.5. Some were at 2.6, 2.9, 4.3. Raw...

10 July 2021 9,601 10 View