Protein in marine plankton: A comparison of spectrophotometric methods

Measuring protein is critical to many investigations in oceanography and marine biology. Here, we compared seven colorimetric protein assays (Rutter, Rutter-SDS, Markwell, BCA, microBCA, Bradford and microBradford) for measuring protein in a mysid (Leptomysis lingvura), in a jellyfish (Pelagia noctiluca), and in three different size fractions of marine plankton (0.7–50, 50–200 and 200-2000 μm). Significant differences occurred in all of these...