The change of the relative numbers of the polar and non-polar amino-acids as a result of a mutation must produce big changes in the protein structure.

Polar Amino Acids: These amino acids have side chains that are hydrophilic and can form hydrogen bonds with water.Examples include serine, threonine, cysteine, asparagine, and glutamine. Non-Polar ...

Both of these amino acids are non-polar and aliphatic and have a four-carbon side chain emerging from the basic amino acid structure. The skeletal structure of leucine is shown below.

Inside this red circle lies the world’s driest non-polar desert, a place where rain is so scarce it may not fall for years or even decades. This desert, unlike polar deserts covered in ice, is a ...

Taking the amino acid L-tryptophan 2–3 gm/day or 5-hydroxytryptophan (5-HTP) 25 to 100 mg up to three times a day may have beneficial effects on anxiety associated with mania.

Based on their calculations, Zewail and his colleague argue that hydrophobic interactions between non-polar amino acid residues are sufficient to fold a polypeptide chain into its native shape in ...

“The main bitter peptides hold in their chains non-polar amino acids situated at the middle or the extremity of the peptide chain and this structural characteristic is fundamental for the interaction ...