SYNOPSIS Immunofluorescent serum IgM and/or a significant level of IgA antibody was detected in 87 % of 39 cases of current or recent influenza A infection from two to 84 days after the onset of illness. Secondary IgM staining occurred in 5% of sera and a significant correlation was found between complement-fixing and class-specific antibodies. It was estimated that the immunofluorescent test c...

Immunofluorescent serum IgM and/or a significant level of IgA antibody was detected in 87% of 39 cases of current or recent influenza A infection from two to 84 days after the onset of illness. Secondary IgM staining occurred in 5% of sera and a significant correlation was found between complement-fixing and class-specific antibodies. It was estimated that the immunofluorescent test could be di...

Simian virus 40 (SV40) DNA was microinjected into cultured mammalian cells by means of electrophoresis (iontophoresis). Successful transfer of DNA into cells was confirmed by detecting SV40 T antigen using the indirect immunofluorescent technique.

A monoclonal antibody, Leo Mel 3, raised against a melanoma cell line (LiBr), binds to a carbohydrate determinant of cell surface gangliosides, the simplest of which is GD3. This monoclonal antibody was screened for by its capacity to block the recognition and lysis of the melanoma cells by cytotoxic T-lymphocytes with anomalous killer cell function, illustrating a novel approach for identifyin...

Nervous system development involves a sequential series of events that are coordinated by several signaling pathways and regulatory networks. Many of the proteins involved in these pathways are evolutionarily conserved between mammals and other eukaryotes, such as the fruit fly Drosophila melanogaster, suggesting that similar organizing principles exist during the development of these organisms...

alpha2-Macroglobulin (alpha2M) has been identified on the luminal surface of endothelial cells in sections of normal human arteries, veins, and lymphatics by the indirect immunofluorescent technique. The specificity of the immunofluorescent reaction was confirmed by immunoabsorption studies. Prior absorption of the anti-alpha2M antiserum by purified alpha2M at equivalence completely inhibited e...