>sp|Q8WU39-4|MZB1_HUMAN Isoform 4 of Marginal zone B- and B1-cell-specific protein OS=Homo sapiens OX=9606 GN=MZB1 MRLSLPLLLLLLGAWAIPGGLGDRAPLTATAPQLDDEEMYSAHMPAHLRCDACRAVAYQR LCSYPPHLPLTEQQS