>HXB4_MOUSE
MAMSSFLINSNYVDPKFPPCEEYSQSDYLPSDHSPGYYAGGQRRESGFQPEAAFGRRAPC
TVQRYAACRDPGPPPPPPPPPPPPPPGLSPRAPVQPTAGALLPEPGQRSEAVSSSPPPPP
CAQNPLHPSPSHSACKEPVVYPWMRKVHVSTVNPNYAGGEPKRSRTAYTRQQVLELEKEF
HYNRYLTRRRRVEIAHALCLSERQIKIWFQNRRMKWKKDHKLPNTKIRSGGTAGAAGGPP
GRPNGGPPAL