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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: Adv Exp Med Biol. 2020;1223:155–165. doi: 10.1007/978-3-030-35582-1_8

Fig.1. CD200-CD200R axis is considered to be a pair of checkpoint molecules that regulate tumor-specific immune responses.

Fig.1

CD200 and CD200R shares similar structures with other important immunoglobulin family members such as CD47-SIRPa, PD1-PD-L1 and CTLA4-B7.