It is the basis for building proteins in our body. Lysine is the first limiting amino acid needed to digest food proteins: in the lack of it, no matter how much proteins were in the food, these still not assimilated. To construct the proteins, the body uses only L-lysine.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.
Large planets in the Solar System like Jupiter and Saturn are known to have large moons with some of the conditions for life. Therefore some scientists speculate that large extrasolar planets (and double planets) may have similarly large moons that are potentially habitable.
Mercury and Venus which are the first two planets (in order of distance), they have no moons. If you mean in our solar system, neither Mercury or Venus have moons. There are over 340 exoplanets known so far, but astronomers don't have detailed enough data or images to know if any of those planets have moons or not.