Additional file 1.

Figure S1: The morphology of the slug (Polysphondylium pallidum) in the presence of adenosine and caffeine. Adenosine favours large slug formation whereas caffeine induces emergence of many slugs from the individual aggregate. Morphology of slugs: a) Control; adenosine at (b) 0.5 mM (c) 3.5 mM and caffeine at (d) 1 mM (e) 2.5 mM (f) 3.5 mM. Scale bar = 200 μm.

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Jaiswal et al. BMC Developmental Biology 2012 12:5   doi:10.1186/1471-213X-12-5