Properties of alkaline phosphatase isoenzymes in plasma of preterm and term neonates.
The isoenzymes of alkaline phosphatase (EC 3.1.3.1) in plasma of 37 preterm and 21 term neonates two weeks postpartum have been studied with regard to electrophoretic mobility, sialic acid content, inhibition properties, heat lability, molecular mass, and binding to lectins. Term infants generally had a single form of alkaline phosphatase present in significant amounts, identified by the above criteria as originating in bone. All the preterm neonates had two alkaline phosphatase isoenzymes in plasma, namely, bone- and fetal-type intestinal alkaline phosphatase. Liver-, placental-, and adult-type intestinal alkaline phosphatase were not detected in any of the plasma samples.
Crofton
P M
PM
Department of Paediatric Biochemistry, Royal Hospital for Sick Children, Edinburgh, U.K.
D000469:Alkaline Phosphatase / Q000097:blood*; D001797:Blood Protein Electrophoresis; D001842:Bone and Bones / Q000201:enzymology; D006358:Hot Temperature; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D007422:Intestines / Q000201:enzymology; D007527:Isoenzymes / Q000097:blood*; D037102:Lectins / Q000378:metabolism; D008099:Liver / Q000201:enzymology; D008970:Molecular Weight; D019158:N-Acetylneuraminic Acid; D010920:Placenta / Q000201:enzymology; D012794:Sialic Acids / Q000032:analysis
D007527:Isoenzymes; D037102:Lectins; D012794:Sialic Acids; D000469:Alkaline Phosphatase; D019158:N-Acetylneuraminic Acid