850 query 845:FVRLKQQISDH: 855 sp|P40189|IL6RB_HUMAN[1] 845:FVRLKQQISDH: 855 sp|P40190|IL6RB_RAT[1] 844:FVRLKQQVSDH: 855 sp|Q00560|IL6RB_MOUSE[1] 843:FVRLKQQVSDH: 854