Fig. 1From: Identification of small RNAs involved in nitrogen fixation in Anabaena sp. PCC 7120 based on RNA-seq under steady state conditionsFilamentous cells of Anabaena sp. PCC 7120 on different media after 3 d culturing. a and c Show the cells on AA/8(N−) medium, arrow heads indicate the heterocysts. b and d Show the vegetative cells on AA/8(N+) medium. Bars = 10 μmBack to article page