Boucle yarn is a loose, three ply yarn with a characteristic curly appearance. Used in weaving, knitting, and crocheting, boucle...
Cold agglutinins are antibodies that cause clumping or agglutination of RBCs at cold temperatures in individuals with certain conditions or who are infected by particular organisms. Cold agglutinins are associated with Mycoplasma pneumoniae infection. M. pneumoniae has i antigen specificity to human RBC membranes. Fetal cells largely contain i antigens, but by 18 mo most cells carry the I antigen.
Target and Attack. Hemagglutinin is one of the reasons that influenza virus is so effective. It is a spike-shaped protein that extends from the surface of the virus. In the active form, shown here from PDB entry 1ruz , hemagglutinin is composed of two different types of chains, shown in blue and orange. The blue chains are the targeting mechanism: they search for specific sugar chains on our cellular proteins.