Current Topics in Microbiology and Immunology / Ergebnisse der Mikrobiologie und Immunit?tsforschung, W. Arber; R. Haas; W. Henle; P. H. Hofschneider; J
Описание: Each control operation is mediated by a pair of complementary genetic elements (hereafter called "control cell"): a control gene which produces a l control (or regulator) protein and a control site which is the target for the regulator protein. Negative control means that the control protein (repressor) prevents gene expression.
Описание: The Herpesviruses A consideration of the genetic analysis of members of the herpesvirus group necessitates a description, albeit brief, of the properties of the group and, most importantly, of their genetic material.
Описание: This teachers guide is structured around 10 fundamental questions about biological evolution. The teachers guide explores the DVD`s commentary from some of the world`s most well-known biologists, who gathered on the Galapagos Islands during a World Summit on Evolution and were interviewed about everything from what evolution is to how it happens to why anyone should care.
Описание: Yosemite is one of the most visited national parks, with scenery that is world-renowned. Photographer Harold Davis has explored Yosemite for years with his camera, finding the best vantage points and most photogenic times of year. Postcards in this book show Yosemite in winter, Vernal and Nevada Falls, Mirror Lake, Yosemite Valley, the view from Inspiration Point, and more
Описание: "When we give a definition it is for the purpose of using it". HENRI POINCARE in Science and Method A. Objectives The first version of this paper was written to introduce new students and fellows of my laboratory to the mysteries of herpesviruses. Consonant with this design sections dealing with well documented data were trimmed to the bone whereas many obscure phenomena, controversial data and seemingly trivial observations were discussed generously and at length. There is some doubt as to whether it was meant to be published, but it was not a review. The objective of reviews is frequently to bring order. But alas, even the most fluent summation of credible data frequently makes dull reading and too much plausible order, like very little entropy in chemical reactions, is not the most suitable environment on which to nurture the urge to discover. This version is more charitable but not less inbalanced. The bibliography reflects the intent of the paper and was updated last in December of 1968. It should be obvious without saying that no single account such as this can do justice or injustice, as the case may be, to the several hundred papers published on herpesviruses each year or to the many thousand papers published on herpesviruses since the first of the members of the family was experimentally transmitted to a heterologous host more than half a century ago (GRUTER, 1924). B. Definition 1.
Описание: The study of streptococcal infections and their sequelae has in the last two decades yielded several important findings on the biological properties of cellular and extracellular products of group A streptococci.
Описание: At the end of the last century and the beginning of this century, the prob- lems of immunity in lower vertebrates and the influence of environmental temperature attracted attention for the first time (ERNST, 1890;
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