Kenneth H Johnston

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In studies primarily confined to the amino-terminal region of the fibrillar group A streptococcal M protein, only limited immunological crossreactions have been observed among M serotypes. In this investigation, two monoclonal antibodies generated against nearly the entire M6 molecule (LysM6) were used to determine the extent of crossreactions among M(More)
Neisseria gonorrhoeae has been subdivided into several classes of serological distinct groups. The serotyping system is based upon the antigenic specificity of a protein serotype antigen. This protein is the major polypeptide of the outer membrane of the gonococcus and accounts for over 60% of that membrane's total protein. The serotype antigen complex was(More)
Numerous investigators, most notably Rammelkamp (1) and Stollerman (2), have established that acute poststreptococcal glomerulonephritis (APSGN) ~ results from infection with a limited number of serological types of group A streptococci. However, even within a given nephritogenic type, it has been noted that not all strains cause nephritis, thereby(More)
Epstein-Barr Nuclear Antigen 1 (EBNA1) is essential for Epstein-Barr virus to immortalize naïve B-cells. Upon binding a cluster of 20 cognate binding-sites termed the family of repeats, EBNA1 transactivates promoters for EBV genes that are required for immortalization. A small domain, termed UR1, that is 25 amino-acids in length, has been identified(More)
Streptokinases secreted by nonhuman isolates of group C streptococci (Streptococcus equi, S. equisimilis, and S. zooepidemicus) have been shown to bind to different mammalian plasminogens but exhibit preferential plasminogen activity. The streptokinase genes from S. equisimilis strains which activated either equine or porcine plasminogen were cloned,(More)
Each time a piece of observational phase space is opened up, new discoveries are made and existing theories are challenged. In astronomy, therefore, there is a constant push to build instruments capable of greater sensitivity and higher spatial, temporal, and spectral resolution. The technique of interferometry has for many decades provided high angular(More)
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