Answer:
1. Ser and Gln are polar amino acids.
2. The Leu side chain does not form hydrogen bonds with other amino acids.
3. Phe can undergo oxidation to form Tyr.
4. Lysine has one stereocenter (chiral center).
Explanation:
Serine and glutamine are the polar amino acids with uncharged side group. Serine has a "CH2OH" group as its side chain and the presence of hydroxyl group makes it a polar amino acid. Glutamine is one of the amides derived from other amino acids present in proteins.
Leucine is a nonpolar amino acid with an aliphatic side chain and tends to cluster within the proteins to stay away from the surrounding watery medium. Its aliphatic R group does not form any hydrogen bonds to other amino acids.
Phenylalanine is a nonpolar amino acid with an aromatic R group. Oxidation of aromatic R group of phenylalanine converts it into tyrosine which has an additional hydroxyl group in its side chain.
The chiral center is the carbon to which four different functional groups are bonded. The central alpha carbon atom of lysine is bonded to an amino group, carboxyl group, a hydrogen atom, and one positively charged R group which in turn makes it a chiral center.
Explanation:
couldn't see a model of the cyst, but most cysts are filled with sebaceous fluid, dead skin cells, superficial dirt and lipids, some can be very painful to the touch. If it is infected, it's appearance is red and sits on the epidermis layer where nerve endings can be found. your body will trigger WBC's to that area to fight infection. A dermatologist will prescribe an antibacterial topical solution in addition to an oral antibiotic. homeostasis in that area of skin is disrupted causing pain, swelling, and possible growth, making these symptoms worse. once on antibiotics, your dr. will excise the cyst relieving its contents, pressure, and pain.
I would say the cytoskeleton is most like Scaffolding.