They are both nucleic acids. Regarding structure, DNA and RNA are similar because they are both built of nucleotides, structures consisting of one nucleobase, a sugar (ribose or deoxyribose respectively) and a phosphate group.
Recent intake recommendations to meet the lysine requirement range from 64 to 30 mg/(kg Â· d) for 0.5-y infants and adults (>18 y), respectively. Lysine intake in the Western human diet is in the range 40â180 mg/(kg Â· d). An upper limit of 300â400 mg/(kg Â· d) can be considered in humans. l-Lysine is a basic amino acid characterized by the presence of an amino group at the end of a 4-carbon aliphatic side chain [-(CH 2) 4-NH 3 +].
(However, for many people, eating lysine-rich foods may provide enough lysine that supplements may not be needed.) The typical dosages used range from a low of 500 mg (0.5 g) daily to 1,000 mg (1 g) three times daily. Some experts have even suggested dose as high as 3,000 mg (3 g) three times daily for severe outbreaks.