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Figure 6 | BMC Microbiology

Figure 6

From: Heterologous expression and processing of the flavescence dorée phytoplasma variable membrane protein VmpA in Spiroplasma citri

Figure 6

Production of the E. coli β-lactamase by S. citri transformants. A, detection of β-lactamase activity by Cephinase™ paper disk assay in spiroplasmas transformed by pSTP2 (empty vector), pSTBl1, and pSTBl2. B, secretion and diffusion of free β-lactamase in the culture medium at 24, 48 and 72 h post-inoculation. Numbers above the arrows indicate the diameter (in mm) of the S. citri (white arrow) and E. coli (black arrows) growing areas.

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