1st step
RAG1/2 cleaves between the heptamers and segments
2nd step
hairpins formed at the coding joint
3rd step
hairpins cut-> can happen in multiple locations create p-nt
4th step
Tdt adds n(non-coded)-nt
5th step
fill in base pairs of n-nt
6th step
some unpaired n-nt will get deleted
7th step
add in base pairs for p-nt
which steps are unique to heavy chain
4,5,6
anything to do with Tdt is in what chain
heavy