The present invention provides isolated and purified DNA encoding feline
CD80 (B7-1) ligand, feline CD86 (B7-2) ligand, feline CD28 receptor, or
feline CTLA-4 (CD152) receptor, as well as vectors comprising nucleic
acid encoding feline CD80, feline CD86, feline CD28, or feline CTLA-4.
The present invention provides a host cells transformed with
CD80-encoding vectors, CD86-encoding vectors, CD28-encoding vectors, or
CTLA-4-encoding vectors. The invention provides polypeptides encoded by
the nucleic acid of feline CD80, feline CD86, feline CD28, or feline
CTLA-4.