preferred_name: CD28 homodimer binds B7-2 monomer (Xenopus tropicalis)
preferred_name_lc: cd28 homodimer binds b7-2 monomer (xenopus tropicalis)
label: CD28 homodimer binds B7-2 monomer (Xenopus tropicalis)
label_lc: cd28 homodimer binds b7-2 monomer (xenopus tropicalis)