-20°C or below
on dry ice
This FBS is 100% US origin. In order to remove small molecules such as glucose, salts, hormones, cytokines, amino acids and also antibiotics, chilled serum is dialysed from 10kDa up to 30,000kDa. This processing method is useful for receptor studies (and radiolabelling assays). However, dialysis does not remove serum bound hormones and it can reduce the growth promotion capabilities of the serum.