1sfu B 2.0 BS01 dna D 0 K44 N47 Q48 Y51 N65 P66 P67 K39 N42 Q43 Y46 N60 P61 P62 ? 0003723,0003726 Q9DHS8 15448208 1 ~ 6 CTVNDAEIFSLVKKEVLSLNTNDYTTAISLSNRLKINKKKINQQLYKLQKEDTVKMVPSNPPKWFKNYNC