SERIES AND SPECIES OF GENES STHEPTOMYCES 



127 



Table 14 

 Characteristics of Streptomyces flavus and allied si oti \\ ii -man, 1957) 



• \n earlier description of this culture on synt hetie agai was inronecth 

 COSe in place of sucrose, which explains the difference between t he previo 



labelled; the medium was made up at that time with glu- 

 ts and present obser\ a1 ions. 



interesting place. A culture (No. 3491) be- were included in the S. parvus subgroup, 

 longing to S. flavus or to S. parvus was iso- Another culture (No. 3686), designated as 

 lated in our laboratories in 1948 and found S. parvus, did not form any spirals. Still 

 capable of producing actinomycin. It was another culture (No. 3687) produced only 

 aonchromogenic and formed a straw-colored limited curling of the aerial mycelium and 

 to yellow aerial mycelium. This culture was mighl l>e considered an intermediate lie- 

 found to belong to the S. flavus subgroup; tween the two subgroups. It was suggested, 

 other cultures (Nos. 3677, 3679, and 3680) therefore (Waksman and Gregory, 1954), 



