Complex sentence: Many publications erroneously describe calprotectin as having a molecular mass of 36.5 kDa, a value that was obtained from early size exclusion chromatography experiments, rather than more accurate sequencing data.
Split into simpler sentences: Many publications erroneously describe calprotectin as having a molecular mass of 36.5 kDa. This value that was obtained from early size exclusion chromatography experiments, rather than accurate sequencing data.