In this article we will discuss about the primary structure of peptides and proteins. Peptides and proteins consist of chains of amino acids linked by peptide bonds. We observe a structure analogy with the biuret molecule, formed by the condensation of 2 urea molecules (as indicated by its name) with elimination of one molecule of NH3(H2N—CO — NH-CO —NH2) and [...]
In this article we will discuss about:- 1. Denaturation of Proteins 2. Important Properties of Proteins 3. Classification. Denaturation of Proteins: The three-dimensional conformation (the primary, secondary, tertiary and even in some cases, quaternary structure) is characteristic of a native protein. This conformation can be upset and disorganized, without breakage of any peptide linkage, only by the rupture of linkages [...]
As indicated by their name, these are coloured proteins, their prosthetic group often contains a metal element (Fe, Cu, Mg). These compounds are generally classified on the basis of their prosthetic group having, or not having, the tetrapyrrol structure called porphyrin and according to their respiratory or non-respiratory physiological role. 1. Porphyrin Chromoproteins: A. Respiratory Pigments: They all contain iron. [...]