>4OR4_1|Chains A, B|Polymerase basic protein 2|influenza B virus (11520) GSHMKIRQRFRFGRLELKRISGRGFKNDEEILIGNGTIQKIGIWDGEEEFHVRCGECRGILKKSKMKLEKLLINSAKKEDMRDLIILCMVFSQDTRMFQGVRGEINFLNRAGQLLSPMYQLQRYFLNRSSDLFDQWGYEESPKASELHGINESMNASDYTLKGVVVTKN