On the surface of our planet, billions of years ago, carbon, hydrogen, nitrogen, oxygen, sulfur atoms interacted and formed increasingly complex molecules. The survival of these molecules depended upon the environment that they formed in.
Some formed in water and some in other liquids.
Over the course of time more complex molecules formed. hydroxyl ions, methyl ions, methane, propane, long chains of carbons (fats). These things (molecules) would stick together forming increasingly complex structures.
At some point structures which we call amino acids would form. These would combine to form even more complex structures.
Some Groups of complex molecules were more stable than other groups of complex molecules.
It isn't like "tyrosine Reductase" (a protein enzyme) randomly popped into existence, rather these complex molecular structures coalesced and became more stable because of their chemistry.
Complex chemical structures that could catalyze things might have been more able to last longer than complex structures that were inert.
I know that advocates of intelligent design will have none of this.
They are notorious for “Reversing the sense of cause and effect" Its like saying that "it’s a miracle that everyone’s legs are exactly long enough to reach the ground."
If you want to understand more, buy Campbells Biology, its very readable and its the Freshman college textbook for the academic biology course in a lot of colleges. Also consider buying Leningers Biochemistry.
I hope this was helpful,
Jeff
Thank you for taking the time to give me a serious answer. But please take a look at the questions I am asking. I am not asking about what we some people think that might have happened. I am asking about current observations on Earth.
Where on Earth can we observe the things I ask regarding protein in my first post?