Fig. 1.
Inhibition of mixed lymphocyte reactions across major histocompatibility barriers.
2.5 × 105 BALB/c spleen cell responders were plated with 5 × 105 irradiated (30 Gy) C57BL/6 spleen cell stimulators in the presence or absence of PG27. After 96 hours of incubation, cultures were pulsed with 1 μCi [3H] thymidine/well for an additional 16 hours. Results are mean cpm from triplicate cultures and are representative of 2 separate experiments.