are these 2 sentences grammarly correct?

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are these 2 sentences grammarly correct? 

The protein is called amyloid protein in the brain and has to be broken down from time to time. Lack of proper break down of the protein results to hardening of the brain cells.

May 6th, 2015

They should read thusly:

The protein is called "amyloid protein" in the brain, and has to be broken down from time to time; lack of proper breakdown of the protein results in hardening of the brain cells.

I hope this is helpful.

May 6th, 2015

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