Biuret test
The effect of acid rains is a form of chemical weathering.
An enzyme
Say the part of the gene that is mutated does not change the amino acid sequence of the protein made through the mRNA; hydrophobic amino acid stays hydrophobic. We have many of these small nucleotide polymorphisms in our genomes and they are useful trackers of human migrations, for instance.
ACID
If you mean how does changing one amino acid have a great effect, that single change may alter the shape of the protein in a critical area, which can make the protein function poorly or not at all.
covalent bonds
The reaction of a protein (with aromatic rings) with nitric acid produce the yellow xanthoproteic acid.
This is the gastric juice, a mixture of hydrochloric acid and pepsin.
Melamine is the chemical you're thinking of, but it's not an amino acid.
When nitric acid comes into contact with proteins, it can lead to denaturation of the protein structure by disrupting the hydrogen bonding and disulfide bridges that maintain the protein's native conformation. This denaturation process can alter the protein's functionality and may eventually lead to degradation of the protein structure. Additionally, nitric acid can potentially react with certain amino acid residues in the protein, affecting its biological activity.
There are twenty different Amino Acids that comprise proteins. The varying combinations and sequences of the Amino Acids produces different proteins.
The amino acid pi of lysine plays a crucial role in protein structure and function by forming chemical bonds with other molecules, helping to stabilize the protein's shape and function. This interaction is important for maintaining the overall structure and function of the protein.