Both drugs had been previously recommended for approval 14-0 by members of FDA's Anti-Infective Drugs Advisory Committee. The significance of two new antibiotics in four weeks? We've recently been averaging one antibiotic every three years.
More melanin presence in the skin makes the skin appear black, and less melanin will make the skin appear less black. White people have very little melanin synthesized by their skin. So, the color of the races is because of some difference in the quanitity of the melanin pigment in our body. That is all.
Variation in genes and skin color. One gene responsible for the production of melanin pigment is SLC24A5. It is found that there are two variations of SLC24A5: 1) One variation is with the amino acid called threonine, which is responsible for the light color of the skin.he pigment that gives color to your skin is melanin. It is also responsible for the color of your eyes. Melanin protects our skin from harmful ultraviolet radiation of the sun by absorbing the rays. More melanin pigment is produced by people with dark skin as compared to light skinned persons.