Patent ID: 8754192

Claim:
A composition of a homogenously glycosylated erythropoietin or fragment thereof, comprising: a polypeptide whose amino acid sequence includes a sequence that: a) is identical to that of SEQ ID NO:1, or b) contains 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acid deletions, substitutions, additions or combinations thereof relative to such SEQ ID NO: 1, and stimulates erythrocyte production; or c) is a fragment of a) or b), wherein the fragment has an amino acid sequence corresponding to amino acid residues 1-28, 29-77, 78-113, or 114-166 of SEQ ID NO: 1; the polypeptide having at least one amino acid residue site glycosylated; wherein each glycosylated polypeptide in the composition has the same glycosylation pattern in that: it is glycosylated on at least one amino acid residue site; it is glycosylated at the same at least one site; it is glycosylated at a site selected from the group consisting of Asn 24 , Asn 38 , Asn 83 , Ser 126 in SEQ ID NO: 1, and combinations thereof; and for a given glycosylation site, it has the same glycan.