Purification of HBsAg from human placental blood by density-gradient zonal centrifugation.
D002499:Centrifugation, Density Gradient / Q000379:methods; D002500:Centrifugation, Isopycnic; D002501:Centrifugation, Zonal / Q000379:methods; D011232:Chemical Precipitation; D002852:Chromatography, Ion Exchange; D005260:Female; D005312:Fetal Blood / Q000032:analysis*; D006514:Hepatitis B Surface Antigens / Q000302:isolation & purification*; D006801:Humans; D011247:Pregnancy
D006514:Hepatitis B Surface Antigens