>sp|Q28071|CD28_BOVIN T-cell-specific surface glycoprotein CD28 OS=Bos taurus GN=CD28
MLRLLLALNFFPSIQVAENKILVKQSPMLVVNDNEVNLSCKYTYNLFSKEFRASLYKGAD
SAVEVCAVNGNHSHPLQSTNKEFNCTVKVGNETVTFYLQDLYVNQTDIYFCKLEVLYPPP
YIDNEKSNGTIIHVKEKHLCPSPRSPESSKPFWALVVVNGVLVFYSLLVTVALSNCWMKN
KRNRMLQSDYMNMTPRRPGPTRRHYQPYAPARDFAAYRS