When compatible Hydractinia symbiolongicarpus colonies recognize each other as “self,” via Alr genes, they fuse together. Credit: Huene, A. L. et al., PNAS, 2022 How a tiny marine invertebrate distinguishes its own cells from competitors’ bears striking similarities to the human immune system, according to a new study led ...
View more: Tiny sea creature's genes shed light on evolution of immunity