INDEX 



75 



Lactobacillic acid, Cont. 



isolation from Lactobacillus 

 arabinosus lipids, 4 



location of cyclopropane ring in, 

 42-47 



main X-ray spacings of, 5, 15 



melting point of, 4, 15 



metabolic relation to cw-vaccenic 

 acid, 38, 39, 41 



microbiological determination 

 of, 33-35 



nonadecanoic acid from, 6, 7 



one-carbon fragment in biosyn- 

 thesis of, 48 



presence in bacterial phospho- 

 lipids, 5 



reaction with HBr, 7, 42, 43 



stability to oxidation, 7 



structure of, 6, 7, 23 



cw-vaccenic acid in biosynthesis 

 of, 40, 48, 49 



DL-lactobacillic acid, see DL-cis- 

 11,12-Methyleneoctadecanoic 

 acid 

 Lactobacillus arabinosus, fatty acid 

 composition of, 41 



fatty acids of, 1 



inability to convert m-vaccenic 

 acid to palmitic acid, 67, 68 



lack of fatty acid dehydrogenase 

 in, 57 

 Lactobacillus casei, fatty acid com- 

 position of, 41 



fatty acids of, 1 



lack of fatty acid dehydrogenase 

 in, 57 

 Lactobacillus delbrueckii, fatty 

 acid composition of, 39 



Lactobacillus delbrueckii, Cont. 

 lack of fatty acid dehydrogenase 

 in, 57 

 Lactobacillus planarum, inability 

 to convert oleic acid to stearic 

 acid, 68 

 inability to desaturate long-chain 

 fatty acids, 62 



Mammalian liver, desaturation of 



fatty acids by, 66 

 Methionine-methyl-Ci4, as source 



of methylene bridge carbon of 



lactobacillic acid, 49-52 

 incorporation into d5-9,10-meth- 



ylenehexadecanoic acid by 



Escherichia coli, 54 

 incorporation into lactobacillic 



acid, 52 

 incorporation into Lactobacillus 



arabinosus cells, 52 

 incorporation into lactobacillic 



acid in Lactobacillus casei, 54 

 incorporation into lactobacillic 



acid in Escherichia coli, 54 

 Methyl ketones, formation from 



cyclopropane fatty acids, 46, 



48 

 identification by gas-liquid chro- 

 matography, 48 

 role in locating the position of 



cyclopropane ring in cyclopro- 

 pane fatty acids, 48 

 "Methylation," of cw-vaccenic acid 



by microorganisms, 49-51 

 of oleic acid by microorganisms, 



69 

 of various position isomeric oc- 



tadecenoic acids, 70 



