Molecular-Weight Standards Chart : Proteins

L L • June 16, 2019
Molecular-Weight Standards Chart: Proteins

Molecular-Weight Standards Chart : Proteins

The Reference Proteins as Molecular-Weight Standards

Protein Molecular Weight (kDa)
Relative Calculated Native
Thyroglobulin 340 -- 660.0/19S
Myosin 205 -- 470
Myosin 21 -- --
Myosin 19 -- --
Myosin 17 -- --
α2-Macroglobulin 170 160.8 820.0/19S
β-Galactosidase 116 116.6 540
Phosphorylase-b 94 -- --
Phosphorylase-a 92.5 370
Transferrin Human 80 75.2 80
Serum albumin Bovine 68 66.3 68
Catalase Bovine Liver 60 57.6 230
Pyruvate kinase Muscle 57 -- --
IgG Heavy Chain 55 -- 150
IgG Light Chain 22 -- --
Glutamate dehydrogenase 53 55.6 --
Leucine aminopeptidase 53 51.7 300
Fumerase 49 -- 200
Ovalbumin 45 42.8 --
Alcohol dehydrogenase Liver 41 39.6 80
Aldolase Rabbit muscle 40 39.2 160
Creatine kinase Rabbit muscle 40 43.1 80
Alcohol dehydrogenase Yeast 36 36.7 --
Glyceraldehyde phosphate dehydrogenase 36 35.9 --
Lactate dehydrogenase Pig 36 36.5 140
Tropomyosin Rabbit 36 32.8 65
Pepsinogen Pig 35 39.5 --
Carbonic anhydrase 29 29.3 180
By Laith Khalil March 9, 2026
AI promises to transform biotech, but real-world results are more incremental. A practical perspective on AI in drug discovery, genomics, diagnostics, and lab automation.
October 23, 2025
Discover kbDNA’s rapid workflow for repurifying rituximab biosimilars to high-purity standards—featuring SEC overlays, gel schematics, and SOPs.
Glowing blue and orange DNA strand against a dark background.
By Ed Hamdeh October 13, 2025
Unfiltered truths, hidden risks, and real data behind life sciences R&D in North America. Discover the facts nobody else is sharing—read the full report now