DNA Coding Regions; Pretending to Work with Protein Sequences

This video is the continuation of the previous videos and is focusing on "DNA Coding Regions; Pretending to Work with Protein Sequences". The links to the other videos are the following
Of the hundreds of thousands of protein sequences found in current databases, only a small percentage correspond to molecules that have actually been isolated by somebody or experimented upon. That’s because determining the sequence of a protein is much more difficult than sequencing DNA. As all proteins that a given organism (whether microbe or human being) can synthesize are encoded in the DNA sequence of its genome.
Thus, the smart shortcut that molecular biologists have been using is to read protein sequences directly at the information source; in the DNA sequence.
This way, we can pretend to know the amino-acid sequence of a protein that has never been isolated in a test tube.
Turning DNA into Proteins: The Genetic Code
When you know a DNA sequence, you can translate it into the corresponding protein sequence by using the genetic code, the very same way the cell itself generates a protein sequence.
The genetic code is universal (with some exceptions) and it is nature’s solution to the problem of how one uniquely relates a 4-nucleotide sequence (A, T, G, C) to a suite of 20 amino acids
Understanding how the cell does this was one of the most brilliant achievements of the biologists of the 1960s.