IgG4 - Amino Acid Heavy - UmAb4-P

Natalizumab (human IgG4) biosimilar expressed and purified from CHO cells.  This version contains IgG4 ¹⁵N₄ and ¹³C₆ labeled Arginine and ¹⁵N₂ and ¹³C₆ labeled Lysine residues.  It was developed as an internal standard for quantifying IgG4 antibodies and Fc-fusion proteins with an IgG4 Fc.  

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