This June 5, 2024, image shows lysozyme crystals aboard the International Space Station. Lysozyme is a protein found in bodily fluids like tears, saliva, and milk, and is used as a control compound to demonstrate well-formed crystals. Lysozyme plays a vital role in innate immunity, protecting against bacteria, viruses, and fungi. The crystals were grown with Redwire’s PIL-BOX in a study of the effect of microgravity on various types of crystals production.

Image credit: Redwire