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Cephalin, structure

This report described the synthesis of diether phosphonolipids which resemble cephalins structurally. Infrared spectra were given for dihexadecanoyl L-a-glyceryl-(-2-aminoethyl) phosphonate and dihexadecanoyl L-a-glycerylphosphorylethanola-mine. [Pg.157]

Cephalins are glycerophospholipids present in foods. They differ from lecithins by having ethanolamine or serine instead of choline in their structure. Could you differentiate between lecithins and cephalins on the basis of the three tests to be performed in this experiment ... [Pg.433]

Like phosphatidic acids, lecithins and cephalins contain a polar head and two long, nonpolar hydrocarbon tails. This soap-like structure gives phospholipids some interesting properties. Like soaps, they form micelles and other aggregations with their polar heads on the outside and their nonpolar tails protected on the inside. [Pg.1210]

Cephalin is similar in general structure to lecithin the amine group bonded to the phosphoryl group is the only difference. [Pg.531]

LEARNING CHECK 8.5 ] )raw a typical structure for a cephalin containing the cation of ethanolamine ... [Pg.274]

The most important phosphatides are the lecithins, cephalins, phosphatidylser-ines, and plasmalogens (a phosphatidyl derivative). Their general structures are shown in Table 23.5. [Pg.1051]

The fatty acid portions are usually palmityl, stearyl, or oleyl. The structure shown is a cephalin the three protons on the nitrogen are replaced by methyl groups in the lecithins. Both types of phospholipids are widely distributed in the body, especially in... [Pg.449]

Phosphonic acids are formed from phosphate esters by intramolecular rearrangement (Fig. 47). Ciliatin (2-aminoethylphosphonic acid) is a constituent of phosphonocephalin, which corresponds structurally to cephalin (D 3.2.4), and is incorporated into membranes. Ciliatin may also be methylated to the iV-trimethyl derivative, which corresponds to choline. [Pg.141]

All the proteins found in the red cell are probably not catalytic some play a structural role, particularly in building up the stroma and membrane. The stroma of the erythrocyte, which constitutes 2-5% of the wet weight of the cell, is made of proteins and lipids. The protein is called stromatin, and it contains at least nine different amino acids. Stromatin apparently is related to keratin and carries the blood group antigenic character. Ten per cent of the stroma seems to be composed of lipids among them are cephalin, lecithin, and cholesterol. [Pg.369]

The cephalins have structure similar to that of the lecithins but with the radical —OCH2CH2NH2 in place of the cholyl radical that is, they are the glycerophosphate esters of the alcohol j8-aminoethanol, HO(CH2)2 NH2. The sphingomyelins are the phosphate diesters of choline and the complex alcohol sphingosine, H3C(CH2)i2CH=CHCH(OH)CH(NH2) CH2OH. The cephalins and sphingomyelins are found in the brain and nerves. ... [Pg.472]

J2 What is the structural difference between a lecithin and a cephalin ... [Pg.651]

The structures of the three principal classes of phospholipides found in animal tissues— lecithin, cephalins, and sphingomyelin—are given below. Asymmetric carbon atoms are represented by C . [Pg.338]

Surfactants are classified on the basis of the charge carried by the polar head group as anionic, cationic, nonionic, or amphoteric. Tables 2.1 through 2.4 show the chemical structures of typical examples of these classes. Lecithin, cephalin, and the bile acids are ususally classified as biosurfactants. The bile acids and their conjugates have different properties in solution from surfactants with a long alkyl chain. ... [Pg.7]

Seeds with high oil content usually show the presence of appreciable quantities of these compounds as complex mixtures of polar materials phosphatidylcholine (I) (or lecithin) and phosphatidyl-ethanolamine (II) (or cephalin) are widely distributed both the compounds have the 1,3-glycerophosphate structure, like other phospholipids thus far studied. [Pg.351]

Lecithins and cephalins are two types of glycerophospholipids that are particularly abundant in brain and nerve tissues as well as in egg yolks, wheat germ, and yeast. Lecithins contain choline, and cephalins usually contain ethanolamine and sometimes serine. In the following structural formulas, the fatty acid that is used as an example is palmitic acid ... [Pg.528]

Draw the condensed structural formula for the glycerophospho-lipid cephalin that contains two molecules of palmitic acid and the ionized amino alcohol ethanolamine. [Pg.532]

When phosphatides like lecithin or cephalin are mixed with watei% X-ray investigations show the presence of regular long range structures... [Pg.329]


See other pages where Cephalin, structure is mentioned: [Pg.472]    [Pg.239]    [Pg.247]    [Pg.57]    [Pg.307]    [Pg.158]    [Pg.159]    [Pg.376]    [Pg.729]    [Pg.1246]    [Pg.281]    [Pg.265]    [Pg.122]    [Pg.211]    [Pg.2366]    [Pg.199]    [Pg.69]    [Pg.2]   
See also in sourсe #XX -- [ Pg.338 ]




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