Isolation and some properties of zinc-containing proteins from human placenta.
Applying molecular filtration, the presence of two zinc-binding protein fractions in the human placenta was found. Their molecular weights were 47000 and 7900, respectively. A method for isolation of the high-molecular weight fraction from the placenta was elaborated. It consisted in the fractionation with acetone, Sephadex G-75 filtration, DEAE-Sephadex A-25 chromatography and preparative electrophoresis in polyacrylamide gel. It was calculated that 3.93 g-atoms of Zn are bound to one molecule of the protein. Rabbit antibodies against the zinc-containing protein formed an immunoprecipitate with the whole human amniotic fluid and with two protein fractions obtained following filtration of the amniotic fluids on Bio-Gel P-2.
D000653:Amniotic Fluid / Q000032:analysis; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D006801:Humans; D005779:Immunodiffusion; D007526:Isoelectric Point; D008667:Metalloproteins / Q000032:analysis*; D008970:Molecular Weight; D010920:Placenta / Q000032:analysis*; D011247:Pregnancy; D015032:Zinc / Q000032:analysis*
D008667:Metalloproteins; D015032:Zinc