9dn4 A 1.9 BS01 rna E 0 Y50 P72 Y73 S74 Q118 Y120 R121 R126 Y31 P53 Y54 S55 Q99 Y101 R102 R107 1 ~ 20 EVQLVESGGGLVQPGGSLRLSCAASGFYISYSSIHWVRQAPGKGLEWVASISPYSGSTYYADSVKGRFTISADTSKNTAYLQMNSLRAEDTAVYYCARQGYRRRSGRGFDYWGQGTLVTVSSASTKGPSVFPLAPGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEP