In this article we will discuss about the historical perspectives and types of immunity. Historical Perspectives of Immunity: The phenomenon of immunity (Latin immunis means 'exempt') can be traced back to Thucydides, the great historian of Peloponnesian War. In 430 BC he wrote that a plague spread in Athens, only those could nurse the sick who recovered from the plague [...]
In this article we will discuss about the classification of immunoglobulin. 1. Isotypes: Based on the structure and sequence of their heavy-chain, constant regions, immunoglobulins are divided into five major groups called as classes which are again further subdivided into subclasses. In human, for example, there are five classes of immunoglobulins (commonly called GADME) viz., IgG, IgA, IgD, IgM [...]
In this article we will discuss about: 1. Meaning of Antigens 2. Nature of Antigens 3. Classification 4. Features 5. Factors. Meaning of Antigens: Classically, an antigen is defined as an organism, a molecule, or part of a molecule or substance which may be self or non-self, can evoke noticeable immune response and can bound distinctively with antibodies. Antigenicity is [...]