By this approach, they found that the presence of either the N-terminal moiety (Ala1 to Lys21 residues) containing the chondroitin 4-sulfate side chain or the Kunitz domain I (Lys22 to Arg77 residues) was necessary to bind cells, whereas the uPA expression was inhibited only by the UTI derivative lacking the N-linked oligosaccharide [60]. Here, PLAU is linked to bacterial urinary tract infection.