Antigen Antibody Interactions

Antigen Antibody Interactions

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1. 1 Organization of the Immune System One of the most important survival mechanisms of vertebrates is their ability to recognize and respond to the onslaught of pathogenic microbes to which they are conti- ously exposed. The collection of host cells and molecules involved in this recognition 12 response function constitutes its immune system. In man, it comprises about 10 cells 20 (lymphocytes) and 10 molecules (immunoglobulins). Its ontogenic development is c- strained by the requirement that it be capable of responding to an almost limitless variety of molecular configurations on foreign substances, while simultaneously remaining inert to those on self components. It has thus evolved to discriminate, with exquisite precision, between molecular patterns. The foreign substances which induce a response, called antigens, are typically large molecules such as proteins and polysaccharides. The portions of these with which immunoglobulins interact are called epitopes or determinants. A typical protein epitope may consist of a configuration formed by the spatial arrangements of four or five amino acids and have an average linear dimension of about 20 A.Wii. where j labels rotational positions. It is clear that for a certain ... Wii. , and these are both intrinsic properties of the amino acid sequence. The problem is a generalized random walk in ... A schematic of a polypeptide backbone segment.


Title:Antigen Antibody Interactions
Author: C. Delisi
Publisher:Springer Science & Business Media - 2013-03-13
ISBN-13:

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