Generalized anxiety disorder symptoms include: 1  Restlessness or feeling wound-up or on edge. 2  Being easily fatigued. 3  Difficulty concentrating or having their minds go blank. 4  Irritability. Muscle tension.  Difficulty controlling the 1  worry. Sleep problems (difficulty falling or staying asleep or restless, unsatisfying  sleep)
Protein Properties: Binding Sites [edit]. A binding site is a position on a protein that binds to an incoming molecule that is smaller in size comparatively, called ligand. In proteins, binding sites are small pockets on the tertiary structure where ligands bind to it using weak forces (non-covalent bonding).
These pockets contain the active site, which is the area of an enzyme where the substrate binds and the chemical reaction takes place. In the active site, amino acids of the enzyme protein will bind to the substrate. The substrate fits perfectly into the active site of an enzyme, meaning that enzymes are specific for their substrates and not any others. Lactase cannot break down any other disaccharide besides lactose.