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PubMed1978

Effect of temperature on the order of electrophoretic migration of influenza virus neuraminidase and nucleoprotein genes in acrylamide gels lacking denaturing agents.

When subjected to electrophoresis at 33 degrees C in 3% polyacrylamide gels with no urea added, the nucleoprotein and neuraminidase genes of an H2N2 and H3N2 virus migrate as RNA bands 5 and 6 respectively. If the temperature of electrophoresis is increased to 46 degrees C, however, this order of migration is reversed.

Electrophoresis, Polyacrylamide Gel↗
PubMed1985

Biological activities of lipopolysaccharide fractionated by preparative acrylamide gel electrophoresis.

Lipopolysaccharide from a smooth strain of Salmonella minnesota was fractionated into two major fractions and one intermediate fraction by using sodium dodecylsulfate-polyacrylamide gel electrophoresis. On the basis of the study by Hitchcock and Brown, it was deduced that the top fraction was mainly long O-side chain LPS and the bottom fraction was O-side chain-less LPS. The middle fraction was a mixture of both short O-side chain LPS and O-side chain-less LPS. The antigenic properties and biological activities were not altered in this fractionation procedure. Comparison of the biological activities of the top fraction with those of the bottom fraction revealed that the bottom fraction had higher activity in polyclonal B-cell activation and spleen-swelling effect and that there was no significant difference in adjuvant activity, ability to render macrophages cytotoxic, induction of colony-stimulating factor and the ability to induce the Schwartzmann reaction. It was suggested that O-side chain makes no contribution to the latter biological activities including adjuvant activity of S. minnesota LPS.

Adjuvants, Immunologic↗