FIG. 1.

Defective cell growth of the cps5-138 mutant under restrictive culture conditions. Cell growth was monitored by measuring the turbidity at 640 to 700 nm (red filter) with a Klett-Summerson colorimeter. Wild-type (WT) (○) and cps5-138 (•) cells in EMM at 28°C, wild-type (□) and cps5-138 (▪) cells in EMM at 37°C, wild-type (▵) and cps5-138 (▴) cells in Ca²⁺-free EMM at 28°C, and cps5-138 cells in EMM plus 50 mM CaCl₂ at 37°C (▾).