p thalassemia (p thal) in DBA/2J mice is a consequence of the spontaneous and complete deletion of the p major globin gene. Homozygous p thal mice have clinical and biological features similar t o those observed in human p thal intermedia. Erythrocytes in human p thal are characterized by a relative cell dehydration and reduced K+ content. The role of this erythrocyte dehydration in the reduced...

Background: Interactions of free radicals from ionizing radiation with DNA can induce DNA damage and lead to mutagenesis and carsinogenesis. With respect to radiation damage to human, it is important to protect humans from side effects induced by ionizing radiation.In the present study, the effects of arbutin were investigated by using the micronucleus test for anti-clastogenic activity, to cal...

The human erythrocyte (red blood cell, RBC) demonstrates extraordinary ability to undergo reversible large deformation and fluidity. Such mechanical response cannot be consistently rationalized on the basis of fixed connectivity of the cell cytoskeleton that comprises the spectrin molecular network tethered to phospholipid membrane. Active topological remodeling of spectrin network has been pos...

The enzymatic interconversion involves a net transfer of hydrogen which migrates as a proton (1). In spite of an early reference (2) to the role and existence of this glycolytic enzyme within a variety of animal tissues, it apparently has not been prepared previously in a significantly purified state from any source. Fractions rich in this enzyme have been separated from rabbit muscle (3), and ...

Phosphoglucose isomerase (D-glucose 6-phosphate ketol isomerase, EC 5.3.1.9) of the human erythrocyte was resolved into a major and two minor components. The major enzyme form, isomerase a, was purified to constant specific activity and appeared homogeneous bjl chromatography, electrophoresis, and ultracentrifugation. The minor enzyme forms, isomerases b and c, were also prepared in high purity...

A detailed description of appropriate procedures for the isolation in presumably ahnost pure form of a purine nucleoside phosphorylase from human erythrocytes was presented as the original report of Paper I (1). The present paper will s ummarize the results of investigations concerning the stability characteristics and kinetic properties of the isolated enzyme. Enzymatic degradation of nucleosi...

Study was carried out to understand and compare architecture of the proteins of erythrocyte cell surface of some mammals viz., Homo sapiens (human), Sus scorfa domestica (pig) and Bos taurus domestica (cow). In this study, we investigated the action of proteinases viz., trypsin and chymotrypsin and neuraminidase on the erythrocyte surface proteins and erythrocyte agglutination tendency with a l...

The Ca2+-pumping ATPase (Ca2+-ATPase) was purified from human and pig erythrocyte membranes by calmodulin affinity chromatography in the presence of phosphatidylcholine. The amount of enzyme present in pig erythrocytes is at least 7 times greater than that isolated from human erythrocyte ghosts. However, the properties of the enzyme from the two species are similar in many respects.