In this application note, Axcend demonstrates the use of hand-portable capillary HPLC by the Axcend Focus LC for intact protein analysis. Specifically, the separation of five test proteins in the range of 5.8 to 45 kDa is shown using reversed phase (RP) conditions. Other protein samples can be analyzed using the Axcend Focus LC merely by adapting established conventional high performance LC methods to the capillary column format.