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.
Skin color is due primarily to the presence of a pigment called melanin, which is controlled by at least 6 genes. Both light and dark complexioned people have melanin. However, two forms are produced--pheomelanin, which is red to yellow in color, and eumelanin, which is dark brown to black.
one subgroup of the cloned genes is related to melanosomes and their precursors melanosomes are the granules within melanocytes where melanin is synthesized in humans melanin is the primary determinant of skin color and is also found in hair and the iris the most common form of biological melanin is eumelanin a brown black polymer of dihydroxyindole carboxylic acids and its reduced forms most eumelanins are derived from the amino acid tyrosine