A quick and gentle method for mounting crystals in capillaries

The capillary mounting of protein crystals is still necessary under some circumstances, despite its being supplanted by loop mounting/flash freezing as the favored method for crystal mounting prior to data collection. Traditional capillary mounting methods require a degree of dexterity and finesse that causes apprehension among many crystallographers. Here a simple method for capillary mounting that uses a loop for depositing the crystal in the capillary is described.