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. Author manuscript; available in PMC: 2014 Mar 5.
Published in final edited form as: Mol Biosyst. 2013 Jan 22;9(3):339–342. doi: 10.1039/c3mb25552b

Fig. 2.

Fig. 2

Strategy for conjugating fluorescein di-β-D-galactopyranoside (FDG) to bovine pancreatic ribonuclease (RNase A). The linkage is made via a cysteine residue installed at position 19 of RNase A by site-directed mutagenesis.