Colonies of Bacillus mycoides environmental strains. Colonies are formed by bacillar cells linked end to end in filaments running as bundles with a genetically determined curvature direction. At the left, DX, with projections curving clockwise and at the right, SIN96, with opposite curvature. Colonies are named as they are seen from bottom of the plate. Strains were grown at room temperature for 30 h on 1.5% agar TS plates. Scale bar = 1 cm.