152 THE ACTIXOMYCETES, VOL. Ill 



C. Substances for which three Ught-absorption maxima have been reported 



1. 239, 270 to 280, and 840 in pH 7.8 phosphate fervenuhn 

 buffer 



2. 248 to 2o0, 311 to 312, and 388 in etlianol aureothricin 



thiohitin 



3. 288 to 292, 300 to 308, and 315 to 320; tetraenes endomycin A 



tennecetin 



4. 338, 359, and 380; hexaene endomycin B 



D. Substances for which more than three hght-absorption maxima have been reported 



1. 228, 258, 288, and 427; reddish purple color aklavin 

 with H2SO4 



2. 240, 255, 305, and 375; yellow, water-insoluble albofungin 

 substance 



E. Water-soluble substances with no specific light-absorption spectra, but often with 

 end-absorption of ultraviolet light 



actinorubin grizin 



antibiotics 136, A 20, GB/229, hygromycin B 



and 587/13 mycothricins 



cephalomycin streptothricin 



grasseriomycin virusin 1609 



F. Miscellaneous substances 



1. Basic substance, soluble in water, yellow in flaveolin 

 acid solution, reddish in alkaline solution 



2. Water-insoluble substance; can be autoclavcd ramnacin 

 from pH 2 to 10 



III. Antibiotics active mainly against fungi, and with little or no activity against bacteria 

 A. Substances for which \'isible and or ultraviolet light al)sorption has been reported 



1. Tetraenes: light-absorption maxima at about 290 to 292, 300 to 305, and 317 

 to 320 



amphotericin A nystatin 



antibiotic PA 86 pimaricin 



antibiotic PA 166 protocidin 



antifungal antibiotic 7071 R. P. rimoeidin 



antifungal antibiotic J 4B sistomycosin 



antimycoin tetraene antifungal antibiotic 



chromin tetrin 



endomycin A unamycin 



etruscomycin 



2. Pentaenes: light-absorption maxima at about 317 to 324, 330 to 340, and 349 

 to 358 



aliomycin fungichromatin 



antibiotic PA 153 lagosin 



cabicidin moldcidin A 



eurocidin pentaene antifungal antibi- 



filipin otics I and II 



fungichromin pentamycin 



