Standards for categorization of Proteins:
The major criteria utilized in categorization of proteins comprise:
i) function
ii) structural complexity
iii) shape
Categorization on Basis of Function:
Catalytic Proteins:
Catalytic proteins are class of proteins which accelerate rate of biological reactions. This class is by far largest, as virtually all steps in metabolism are catalyzed by enzymes which are generally proteinuous by nature.
Transport Proteins:
Transport proteins carry particular substances from one place to another. Hemoglobin, for instance, transports oxygen from lungs to various parts of body and carbon dioxide back to lungs for exhalation. Serum albumin, another transport protein, carries fatty acids from adipose tissues to different organs. Transmembrane proteins such as Na+/K+ ATPase, glucose and amino acid transporters, are proteins found in cellular membranes and they assist to transport ions and metabolites across such membranes.
Structural Proteins:
These proteins assist in formation and maintenance of biological structures. They give power and protection to cell and tissues. Examples of structural proteins comprise α-keratin found in hair, horns and fingernails and collagen located in bone, tendons, connective tissues, cartilage and hide. Others are elastin (in ligaments) and fibroin (in spider's web).
Regulatory Proteins:
Proteins which assist to control skill of other proteins to perform their physiological functions are known as regulatory proteins. Insulin is the good example. It assists to control glucose metabolism in animals. Other hormones which are regulatory proteins comprise somatotropin and thyrotropin.
Storage Proteins:
Storage proteins give reservoir of necessary nutrient. As nitrogen is limiting nutrient for development, organisms have exploited proteins as the source of nitrogen in their time of need. For instance, ovalbumin, protein of egg white, gives developing embryo with the source of nitrogen in its development within egg. Casein of milk serves as major nitrogen source for mammalian infants. Again, few seeds of higher plants have proteins which serve as good sources of nitrogen in germination.
Scaffold Proteins:
Scaffold proteins give anchorage for other proteins. They help binding of such proteins with other structures in cell.
Protective and Defensive Proteins:
Immunoglobulins defend body by recognizing, binding and neutralizing foreign molecules. Thrombin and fibrinogen are blood clothing proteins whose significance is in prevention of continuous blood loss. Other proteins such as phospholipase found in snake venom play the rather protective role.
Classification on the Basis of Structural Complexity:
Simple Proteins:
Simple proteins have only amino acids. Albumins of egg, protamines, globulins, lectins are all simple proteins.
Conjugate Proteins:
Conjugated proteins have lastingly related chemical components, additionally to amino acids. Few subclasses of this group of proteins comprise: glycoproteins, lipoproteins, and metalloproteins etc.
Classification on the Basis of Shape:
Globular Proteins: In terms of shape, globular proteins are spherical or oval. They are simply soluble. E.g: albumins and globulins.
Fibrous Proteins: Fibrous proteins are lengthened or needle shaped. These proteins are mainly insoluble and are extremely resistant to digestion. E.g., Elastin, collagen and keratin.
Classification on the Basis of Nutritional Importance:
Complete Proteins: They have all the necessary amino acids in proportion they are needed. Good example is casein found in milk. This class of protein is nutritionally rich and is also known as first class protein.
Incomplete Proteins: Incomplete proteins lack at least one necessary amino acid and as such, can't promote development in growing individuals. For instance protein from cereals lacks lysine.
Tutorsglobe: A way to secure high grade in your curriculum (Online Tutoring)
Expand your confidence, grow study skills and improve your grades.
Since 2009, Tutorsglobe has proactively helped millions of students to get better grades in school, college or university and score well in competitive tests with live, one-on-one online tutoring.
Using an advanced developed tutoring system providing little or no wait time, the students are connected on-demand with a tutor at www.tutorsglobe.com. Students work one-on-one, in real-time with a tutor, communicating and studying using a virtual whiteboard technology. Scientific and mathematical notation, symbols, geometric figures, graphing and freehand drawing can be rendered quickly and easily in the advanced whiteboard.
Free to know our price and packages for online biology tutoring. Chat with us or submit request at [email protected]
Surface Tension of Solutions tutorial all along with the key concepts of Adsorption on Solids, Adsorption of Gases by Solids, Adsorption Isotherms and Langmuir Adsorption Isotherm
www.tutorsglobe.com offers properties of aldehydes and ketones homework help, properties of aldehydes and ketones assignment help, online tutoring assistance, organic chemistry solutions by online qualified tutor's help.
looking for affordable and top-notch nuclear reactor physics assignment help? sign up with us and score top grades.
a wire’s length lying in the magnetic field and where an emf is induced is termed as a coil.
The advantages of the uniform costing high standards, cost comparision, healthy competition, automation of data, benefits to similar units, fair prices, decreased labour turnover.
tutorsglobe.com phytohormones assignment help-homework help by online plant growth tutors
Theory and lecture notes of Market Structure and Game Theory all along with the key concepts of market structure, Game Theory, Foundations and Principles of game theory, Static Games of Complete Information. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Market Structure.
Solution Properties of Polymers tutorial all along with the key concepts of several substances as polymers, principles liquid crystal operates, applications of solution properties of polymers, Some molecules of liquid crystals
Approach our apt Russian History Assignment Help tutors and attain excellent grades without any efforts at low prices.
complaints of geysers - no hot water, insufficient quantity of hot water, constantly fuse blowing, steam in hot water, high consumption of power leading to increased electricity bill.
tutorsglobe.com factors affecting stomatal movement assignment help-homework help by online water transport tutors
Theory and lecture notes of Finite Difference Method-Nonlinear ODE all along with the key concepts of differential equations, Heat conduction with radiation, Relaxation Method, Implementing the Relaxation Method. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Finite Difference Method-Nonlinear ODE.
Theory and lecture notes of Monopoly all along with the key concepts of monopoly, Sources of Monopoly, Short-Run Analysis, Inverse Elasticity Pricing Rule, Monopolist’s Demand for Inputs. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Monopoly.
Heat Engines tutorial all along with the key concepts of Basic Operation of Heat Engine, Thermodynamic Efficiency of Real Engines, Efficiency of Otto Engine, Efficiency of Stirling Engine, Heat Flow into Ideal Stirling Engine
tutorsglobe.com imperfections in solids assignment help-homework help by online solid state chemistry tutors
1943899
Questions Asked
3689
Tutors
1459463
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!