Preparation Pituitary hFSH Urinary hFSH GH3hFSH hFSH24 hFSH21 hFSH21/18 Amt. anal. (μg) 19.1 30.2 22.5 21.4 26.5 13.1 Glycan Ions1 2/80 11/67 11/33 30/109 25/108 40/43 Neutral Cores Inferred 34 25 25 49 50 39 Asialo-Neutral Cores Detected 27 24 20 42 53 43 1Neutral / acidic glycan ions detected in negative mode nano-electrospray MS.

Table 2: Summary of glycan ions detected by nano-electrospray mass spectrometry of six hFSH preparations.