This is somewhat like the way antibodies are formed. There are genetic changes (recombination) at the DNA level in the antibody hyper-variable regions. This is

This is somewhat like the way antibodies are formed. There are genetic changes (recombination) at the DNA level in the antibody hyper-variable regions. This is how we produce antibodies for everything based on a single gene (somewhat). However, antibody VDJ recombination is more akin to write-only memory. Once it is produced, it doesn't change.