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 +].
There is a correlation between lysine deficiency and the lack of calcium in bone tissue. At present, lysine is an essential part of prevention and treatment of osteoporosis. All women in the postmenopausal age need to take a minimum of 500 mg of lysine per day, and if their diet is not enough animal protein, even more.owever, a vegetarian diet and a low-fat diet, the need for lysine can be not fully satisfied. Lysine is found in abundance in red meat, chicken, turkey, dairy products such as yogurt and cottage cheese.