A procedure is described for purifying a low molecular weight peptide that induces differentiation in mouse myeloid leukemia M1 cells. The factor comes from the conditioned medium of macrophage-like cells differentiated from mouse myeloid leukemia M1 cells. The procedure for purification includes gel filtration on Sephadex G-15, anionic exchange chromatography, thin-layer chromatography, revers...

Transferrin, a glycoprotein involved in iron transport in body fluids, was isolated from amniotic fluid of a hydramniospatient by sequential anion-exchange chromatography and gel filtration. The N-glycans of human amniotic fluid transferrin (hAFT) were enzymatically liberated by PNGase-F digestion, isolated by gel filtration and fractionated by (high-pH) anion-exchange chromatography. After alk...

The intranuclear binding of radioactive hormone in prostate after the intravenous administration of testosterone-l ,2-3H to rats has been studied. Nuclei obtained by sucrose density gradient centrifugation were extracted with buffer containing 0.6 M NaCl, and the soluble radioactivity was separated into bound and free fractions by gel filtration on Sephadex G-25 or G-ZOO. As early as 15 min aft...

The extracellular endo-1,4-beta-glucanase components of Ruminococcus flavefaciens FD-1 were analyzed by high-performance liquid chromatography (HPLC) by using DEAE ion-exchange, hydroxylapatite, and gel filtration chromatography and polyacrylamide gel electrophoresis (PAGE). Two endo-1,4-beta-glucanase peaks were resolved by DEAE-HPLC and termed endoglucanases A and B. Carboxymethyl cellulose (...

Medium conditioned by human placental tissue was found to stimulate granulocytic and monocytic colony formation by human marrow cells in semisolid agar cultures. The colony-stimulating activity of unfractionated conditioned medium was equivalent to the activity of standard peripheral blood underlayers. Placentas were a reliable source of active material, and one placenta provided enough materia...

Exosomes are 40-100 nm nanovesicles containing RNA and different proteins. Exosomes containing proteins, lipids, mRNAs, and microRNAs are important in intracellular communication and immune function. Exosomes from different sources are usually obtained by combination of centrifugation and ultracentrifugation and according to published data can contain from a few dozens to thousands of different...

a blocker of postsynaptic acetylcholine receptors was isolated from venom of the eastern green mamba dendroaspis angusticeps, by gel filtration, ion-exchange and reverse phase high performance liquid chromatography. the isolated component blocks neuromuscular transmission and responses to exogenously applied acetylcholine in isolated chick biventer cervices preparations. these results suggest t...