the physicochemical properties of intrinsic factor in amniotic fluid were close to those in gastric juice : the molecular mass was estimated to 49,200 +/- 4,900 da ( n = 24 ) in sephacryl s 300 gel filtration , the cobalamin-protein complex was resolved in 2-6 isoproteins isoelectric at a ph range of 4.6-5.8 and with a mean isoelectric point of 5.18 +/- 0.16 ( n = 5 ) in isoelectrofocusing and it crossreacted with anti-intrinsic factor autoantibodies ( from a biermer anaemia serum ) .
C0042845
cobalamin
C0002892
biermer anaemia