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DNA Sequencing
Monday, January 17, 2005

DNA Sequencing

Dr. Robert Ayanian of Cal State Fullerton gave a presentation to our Creation Science group on Biochemistry. Biochemistry is the study of the chemistry of living things.

A protein is a very complex molecule vital to all living organisms. Proteins perform countless functions. Muscles, enzymes and hemoglobin are a few examples of proteins.

Proteins are constructed from sub-molecules called amino acids. Hundreds of types of amino acids exist in the world, but only twenty types are found in the proteins of living organisms. These twenty amino acids are joined together in long chains to form proteins. Some proteins in living organisms consist of a chain of a length of 100 amino acids, some proteins consist of a chain of over 1000 acids. Your body has thousands of different proteins. The chemical bond that join the amino acids are called peptide bonds, thus the term "polypeptide" is often interchangeable for "protein."

The sequence in which the amino acids are lined up is the primary determinant of how the protein chain will fold up (keep in mind they fold up into specific 3 dimensional shapes), which in turn determines what the protein can and can not do.

The same protein typically shows up in thousands of different organisms. For example, all vertebrates have the protein hemoglobin, however, the hemoglobins of different organisms are not identical. They all have the same general structure and function, but their amino acid sequences are not exactly the same.

What dictates the sequence in which a proteins amino acids are lined up? The DNA of the organism dictates it. Thus when you are looking at the sequence of amino acids in a protein, you are in effect looking at the DNA instructions for building that protein. This is important because DNA is the chemical material of heredity. It is the instructions in their DNA that parents pass on to their offspring.

It is often taught as fact that for the same protein, amino acid sequences for organisms thought to be closely related evolutiontarily, are often more similar that for organisms thought to be evolutionarily distant. For example a human’s amino acid sequence in hemoglobin is more similar to a monkey’s than it is to a frog’s.

IMPORTANT POINT! It is taught that a human’s DNA is more similar to a monkey’s, than to a frog’s....what are the interpretations?

Evolutionist Interpretation: "Monkeys are much more closely related to humans than....frogs." (Quote from Campbell’s Biology, 1994, page 259.)

Creationist Interpretation: This is not a surprise. The DNA and proteins of an organism are an information code. It would be expected that the information code of a human’s would be more similar to a four limbed mammal that lives on the ground, that is fairly similar in weight than it would be with an amphibian that weighs less than 3 pounds. The differences between man and monkey are still significant enough to demonstrate they are quite distinct and not related.

But underneath this genetic similarity argument lurks deceit and suppression of fact.

A typical genetic similarity lesson (Campbell’s) shows a relation between human, monkey, mouse, chicken frog and lamprey. But they leave out some very important facts! Comparing the human’s amino acid sequence to monkey’s shows a 5% difference; from man to frog its 52% and from man to lamprey it is 86%. These figures please the evolutionist and they print them.

However, the numbers they do not like they suppress and they do not display in their books! Look what the results are the lamprey’s amino acid sequence is compared to other animals: the % difference for frogs is 90%, for monkeys it is 90% and for humans it is 86%! There is no progression! This completely ruins any attempt to justify evolutionary belief based on amino sequences. (Source: National center for BioTechnology Information, Entrez, Release 15.1, 1995)

FACT: The evolutionists are very selective in which charts they show the students. They will never teach the data that results when the lamprey is used as the animal to compare to because it ruins their conclusions.

Evolution is a beautiful story with a beautiful hypothesis and beautiful conclusion that is ruined by the ugly facts!





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