Repair methods 1 - Fixing a damaged letter

Repairpairedchains.bmp
When the chains pair-up, key goes with lock; hook with eye.

 

 

 

 

 

 

 

If we think about our short piece of DNA as a pair of chains with locks paired with keys, and hooks paired with eyes.

Imagine that one of the keys is damaged, for example because a gamma ray has broken it in two.

Repairpairedchainsbrokenkey.bmp
One of the letters has been damaged.

 

 

 

 

 

 

 

This situation must be repaired.  In this case the cell will fix the damaged key; welding the missing bit back on.

Repairpairedchains.bmp
When the chains pair-up, key goes with lock; hook with eye.