Isolated blastomeres from 8- to 16-cell-stage embryos were fused by standard micromanipulatory means with either unfertilized eggs or fertilized or haploid parthenogenetically activated pronuclear-stage embryos. The hybrid eggs/embryos were incubated overnight in the presence of Colcemid until they had entered the first cleavage division. Air-dried chromosome preparations were then stained with...

and -IgM k and l light chains did not show the presence of monoclonal components. Reduction with mercaptoethanol (1:2 dilution), which dissociates complexes but does not dissociate albumin dimers, excluded the possible formation of complexes with a1-antitrypsin. Interferences by radio-opaque agents or medications, which could lead to the appearance in the CZE electropherograms of abnormal peaks...

The tau deposits found in neurodegenerative diseases are classified based on their isoforms, that is, 3-repeat (3R) tau and 4-repeat (4R) tau. These isoforms are distinguishable using the antibodies RD3 and RD4, respectively, and Gallyas (Gal) and Campbell-Switzer (CS) silver staining methods, respectively. Tau is also deposited in cerebral infarcts. To characterize the tau profile in these les...

Researchers in molecular biology spend a significant amount of time tending to the staining and destaining of electrophoresis gels. Here we describe a simple system, costing approximately $100 and taking approximately 1 h to assemble, that automates standard nucleic acid and protein gel staining protocols. Staining is done in a tray or, with DNA gels, in the electrophoresis chamber itself follo...

Silver-staining of immunoprecipitates extends the sensitivity of the radial immunodiffusion assay by tenfold. This modification permits the quantification of apolipoproteins A-1, A-11, C, and E at levels of 0.2-1.0 mg/d in plasma samples at a sensitivity threshold of 10 ng. The silver-enhanced radial immunodiffusion method is readily adapted from the standard method, simple and inexpensive to p...

AIMS To verify whether the proposed new silver staining method compares favourably with other well established methods in the detection of Helicobacter pylori in gastric biopsies. METHODS One hundred and forty pairs of antral and fundic biopsies, routinely formalin fixed and paraffin wax embedded, from 70 consecutive unselected patients were stained with haematoxylin and eosin, modified Giems...

With the aid of a simple silver-staining procedure, large numbers and unusual arrays of nucleolar argyrophilic granules were found in Novikoff hepatoma, KB, and HeLa cells. Some of these arrays consisted of linearly arranged discrete granules, and others were in two to three rows each containing three to five granules. Corresponding formations were not found in either the normal or regenerating...

Unambiguous identification of lymphocytes is sometimes difficult because of weak immunostaining of the cell membrane immunoglobulins. A simple method of intensifying the diaminobenzidine (DAB) peroxidase reaction was therefore devised. Paraffin wax sections of formalin fixed tonsils and lymphomas were digested with trypsin and immunostained for kappa and lambda light immunoglobulin chains and C...

Unambiguous identification of lymphocytes is sometimes difficult because of weak immunostaining of the cell membrane immunoglobulins. A simple method of intensifying the diaminobenzidine (DAB) peroxidase reaction was therefore devised. Paraffin wax sections of formalin fixed tonsils and lymphomas were digested with trypsin and immunostained for K and A light immunoglobulin chains and CD3 antige...

Sequence coverage in MS analysis of protein digestion-derived peptides is a key issue for detailed characterization of proteins or identification at low quantities. In gel-based proteomics studies, the sequence coverage greatly depends on the protein detection method. It is shown here that ammoniacal silver detection methods offer improved sequence coverage over standard silver nitrate methods,...