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Evidence that a low m r diffusible factor is involved in communication between compatible mating types of the slime mould physarum polycephalum

, : Evidence that a low m r diffusible factor is involved in communication between compatible mating types of the slime mould physarum polycephalum. Journal of General Microbiology 132(12): 3491-3496

Two compatible mating-types of Physarum polycephalum RSD4 and MA185, have recently been shown to have different surface properties by using aqueous two-phase partition. Changes in the surface properties of RDS4 amoeba were detected when in contact with cell culture medium from MA185 amoeba. The ability of MA185 culture medium to alter the surface of RSD4 amoeba was not affected by autoclaving or passage through a filter that removed molecules of Mr greater than 10 000. Activity was detected in medium from MA185 amoebae that had not previously been in contact with RDS4 amoebae. These results provide evidence for the existence of a low-Mr factor produced by MA185 amoebae which affects the surface of RSD4 amoebae.

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