>2f4vB (B:) observed residues (from ATOM records)
vkelleagvhfgherkrwnpkfaryiyaerngihiidlqktmeelertfrfiedlamrgg
tilfvgtkkqaqdivrmeaeragmpyvnqrwlggmltnfktisqrvhrleelealfaspe
ieerpkkeqvrlkhelerlqkylsgfrllkrlpdaifvvdptkeaiavrearklfipvia
ladtdsdpdlvdyiipgnddairsiqlilsravdliiqarggvvepspsyalvqeae