A modified capillary tube migration technique was used with rodent spleen cells and human peripheral blood leukocytes. Such cells were found to migrate in a consistent manner with the appropriate method. When cells were used from animal or human subjects sensitized to histocompatibility antigens and the corresponding lymphoid cells from the sensitizing strain or human donor were added to the culture media, after prior disruption by ultrasound, inhibition of migration was observed. This was consistent, immunologically specific and increased in degree with the state of immunity of the animal.

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This investigation was supported by grants from the Swedish Medical Research Council, the Swedish Cancer Society, the Damon Runyon Memorial Fund (DRG-954) and the University of Toronto Surgical Association.

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