This binding process stimulates production of a protein called interleukin-10 (IL-10) that acts as an anti-inflammatory compound and which helps keep the immune system's response to the infection in check.
This second kind of analysis is done by lining up lots of known binding sites for a particular protein, comparing them position by position, and so finding out which letter is most likely to occur at which position, and how probable it is that a different letter may sometimes crop up instead.