PPT-LIPOPROTEINS Because lipids are relatively insoluble in aqueous media,

They bind with soluble protein complexes called lipoproteins Lipids can be derived from food exogenous or synthesized in the body endogenous The watersoluble polar groups of proteins phospholipids and free cholesterol. Lipids are….. It can be defined as . nonpolar. organic compound insoluble in polar solvent , but . soluble in organic solvents. such as benzene ,ether, . chloroform.. Biological role of lipids. :. TESTING FOR CATIONS. Calcium (Ca. 2+. ) . Test with aqueous . sodium hydroxide. White ppt. insoluble in excess. Test with . aqueous ammonia. No ppt. or very slight white ppt.. Calcium ions: . Ca. 2+. Lipids-I. -Lipids are esters of long chain fatty acids and alcohols.. -. Fatty acids are lipids’ building blocks . -It can be defined as nonpolar organic compound insoluble in polar solvent , but soluble in organic solvents such as benzene ,ether, chloroform and boiling alcohol.. 5/e. Karen C. Timberlake. © 2016 Pearson Education, Inc.. 17.6 Steroids: Cholesterol, Bile Salts, and Steroid Hormones. High- and low-density lipoproteins transport cholesterol between the tissues and the liver.. nonpolar. organic compound insoluble in polar solvent , but . soluble in organic solvents. such as benzene ,ether, chloroform.. Biological role of lipids. :. Lipids are found naturally in all living organisms.. Lipoproteins. are . types of . Compound Lipids /. Conjugated . Proteins. .. Lipoproteins . are . macromolecules. formed by aggregation of. . :. Lipids . (Neutral . and A. mphipathic ). Proteins. ( Apoprotein) in the human body.. Plasma lipids . 200 . Lipoproteins . 201 . Fatty acids . 200 . Disorders of lipid metabolism . 207 . Cholesterol . 201 . Investigation of hyperlipidaemias . 214 . FATTY ACIDS . Lipids play a critical role in almost all aspects of . PSC 3110 – Fall semester 2008. Introduction. Definition: water insoluble compounds. Most lipids are fatty acids or ester of fatty acid. They are soluble in non-polar solvents such as petroleum ether, benzene, chloroform. Learning. . Objectives. The structure and composition of lipoproteins. Exogenous dietary fat transport vs. endogenous fat transport systems. Key enzymes involved in lipoprotein metabolism. Key cholesterol transporting lipoproteins and the relationship between their concentrations and the incidence of cardiovascular diseases. Glycrophospholipids degradation . Lipoproteins. G. L. Y. C. E. R. O. L. FATTY ACID. FATTY ACID. PHOSPHOACYLGLYCEROL. PHOSPHATE. ALCOHOL. Again this is the representation structure of glycerophospholipids.. .. Importance of lipoproteins formation. .        . 1- . Lipids are water insoluble substance and can not be trasported in an aqueous medium (blood plasma )..             . 2- in order to transport lipids between blood and different tissues they are associated with a protein to form water soluble complex . . Munther. . Lipids. Lipids are compounds that are insoluble in water, but soluble in an organic solvent (e.g., ether, benzene, acetone, chloroform). “lipid” composed mainly from C, H, O . • The main feature, in all lipids, is the large number of carbon-hydrogen bonds which makes them . Main lipids in the blood are the triglycerides and cholesterol.. Insoluble in the water.. Transport in the blood is via lipoproteins. Triglycerides. Glycerol with 3 attached fatty acids. Exogenous source : Dietary. are a large and diverse group of naturally occurring organic compounds that share some general . properties. .. General Properties of Lipids. Insoluble . in water.. Soluble in non-polar organic solvents .