le 



16- 



14 



12- 



lO 



I 1 XIO 4iln 



lAA 

 I 1 



^ r""^ 



( pu Ehr 

 I" ( pk No 2/3 



•2 



■4 



lAA 



4^ 



10 



16- 



14' 



12- 



lO 



B 



HjO 



X 



IAN 



IAN 



— I — 

 l-O 



X 

 H 

 (9 



Z 



u 



16- 



14- 



12- 



lO 



H,0 



-I— 

 •4 



lA A 



— I — 

 10 



16- 



14- 



12- 



lO 



H^ LZ 



—I— 

 O 



-T— 



•2 



Rf 



lO 



Fig. 1. Acidic ether fraction of Oscillatoria spp. A. ChromatograpliccI in isopropa- 

 noi-ammonia: extract = 10 g. fresh wt. of original material. B. Zone Rf 0.3 to 

 0.5 of lA elated and rechromatographed in Ji-butanol-cthanol-1.5 X NH, (6:2:2). 

 C. Zone R, 0.3 to 0.5 of lA eluted and rcchromatograpiicd in water. D. Zone R, 

 08 to 1.0 of lA eluted and rechromatographed in isopropanol-ammonia. Controls 

 of lAA are 1 = 5 X 10"" g/™^ ^^^ successive x 10 dilutions. 



[28] 



