Haemolytic lectins are sugar-binding proteins that lyse and agglutinate cells. Hemagglutination is the process by which red blood cells agglutinate, meaning clump or clog. "Difflugia" are testate amoebae with an agglutinate shell. They typically agglutinate certain animal cells and/or precipitate glycoconjugates. Lectins are similar to antibodies in their ability to agglutinate red blood cells. SP-A has the ability to bind and agglutinate bacteria, fungi, viruses, and other non-biological antigens. The thick-walled skeletal hyphae are a yellow-brown to rust brown, and are slightly less agglutinate. He further noted how the duo used various football references to "agglutinate" its viewers. Amphioxus intelectin has been shown to agglutinate bacteria. The cone is capped by an agglutinate rim that helps to protect its structure.