Accelerated Growth Rate in Synechococcus elongatus UTEX 2973

Electron micrographs of (A) Synechococcus UTEX 2973 and (B) Synechococcus PCC 7942 grown in 3% CO2. Labeled are carboxysomes (C) and thylakoid membranes (T). White arrowheads point to the numerous electron-dense bodies. Bar = 500 nm.