The Episome F 



325 



List of Chromosomal Markers of E. coli 



Key to genetic symbols * 



Activity affected 



L-ribulose 5-phosphate 4-epimerase 



L-arabinose isomerase 



L-ribulokinase 



unknown 



N-acetylglutamate synthetase 



N-acetyl-7-glutamokinase 



N-acetylglutamic-7-semialdehyde dehydrogenase 



acetylornithine-5-transaminase 



acetylornithinase 



ornithine transcarbamylase 



argininosuccinic acid synthetase 



argininosuccinase 



shikimic acid to 3-enolpyruvylshikimate-5-phosphate 



biosynthesis of shikimic acid 



resistance or sensitivity to sodium azide 



unknown 



3'-phosphoadenosine 5'-phosphosulfate to sulfide t 



sulfate to sulfide; four known enzymes t 



dihydrodipicolinic acid synthetase 



N-succinyl-diaminopimelic acid deacylase 



aspartic semialdehyde dehydrogenase 



D-serine deaminase 



galactokinase 



galactose 1 -phosphate uridyl transferase 

 uridinediphosphogalactose 4-epimerase 

 operator mutants 



flagellar antigen 



ten known enzymes and an operator t 



threonine deaminase 



a-hydroxy £-keto acid reductoisomerase t 



a,/3-dihydroxyisovaleric dehydrase t 



transaminase B 



tryptophanase 



galactoside permease 

 /3-galactosidase 

 operator mutants 



three known enzymes and an operator t 

 filament formation and radiation sensitivity 

 diaminopimelic acid decarboxylase 

 unknown 



maltose permease and resistance to phage \ 

 probably amylomaltase 



synthesis of the succinic ester of homoserine t 

 succinic ester of homoserine -\- cysteine to 

 cystathionine t 



{Continued on next page) 



