Methods and {HEAD ~ materials} are provided for {TAIL ~ the production} of compositions of erythropoietin protein, wherein said compositions comprise a pre selected N linked glycosylation pattern as the predominant N glycoform 
Methods and { HEAD ~ materials } are provided for { TAIL ~ the production } of compositions of erythropoietin protein , wherein said compositions comprise a pre selected N linked glycosylation pattern as the predominant N glycoform
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