Chemotaxis toward amino acids by Bdellovibrio bacteriovorus

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Abstract
Chemotaxis toward amino acids by B. bacteriovorus strain UKi2 was studied by the capillary technique. Chemotaxis was optimal when the capillaries were incubated at between 15.degree.-40.degree. C for 30 min; the optimal pH was between 7.0-8.2. The chemotactic response was proportional to the density of the suspension of bdellovibrios up to a density of 108 cells/ml. B. bacteriovorus was attracted to L-asparagine, L-cysteine, L-glutamine, glycine, L-histidine, L-lysine and L-threonine. The possible roles of chemotaxis in the life of B. bacteriovorus are discussed.