>4ORO_1|Chains A, B, C, D|Polymerase PB2|Influenza B virus (11520) GSHMKIRQRQRFGRLELKRISGRGFKNDEEILIGNGTIQKIGIWDGEEEFHVRCGECRGILKKSKMKLEKLLINSAKKEDMRDLIILCMVFSQDTRMFQGVRGEINFLNRAGQLLSPMYQLQRYFLNRSSDLFDQWGYEESPKASELHGINESMNASDYTLKGVVVTKN