From start to finish, it takes less than three hours to label a protein and purify the resulting conjugate using the Pacific Orange™ Protein Labeling Kit. Although optimized for 1 mg of an IgG antibody, this kit can be used to make conjugates of other proteins larger than ~40,000 daltons. The kit provides sufficient material to perform three protein conjugations and purifications. To label 100 µg of an IgG, we have the Pacific Orange™ Monoclonal Antibody Labeling Kit P30014.