What is Hemoglobin?

Hemoglobin is a protein in red blood cells found in finished fetal bovine serum (FBS). Cell fractionation can occur during transportation/handling and processing of raw fetal blood. This can alter the appearance or color of the finished FBS. Generally, normal levels of total hemoglobin in FBS range from 10 – 30 mg/dL and higher concentrations have virtually no effect on cell culture or the quality of the FBS.