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).
AnCE consisting of 615 amino acids is one form of ACE-like protein in D. melanogaster. Its catalytical activity resembles that of the C-domain of human sACE. Acer is the second ACE-related protein identified in D. melanogaster, and its catalytical activity is more similar to the N-domain of sACE.