Tyler Perry Studios. Tyler Perry, an Atlanta-based writer, producer, and performer, is one of the most commercially successful African American filmmakers in history. Tyler Perry Studios, which opened in Atlanta in 2008, is the first major film studio in the nation to be owned by an African American. Perry is best known for his signature character, Madea, whom he has portrayed in both stage plays and films.
Medical Definition of xeroderma. : a disease of the skin characterized by dryness and roughness and a fine scaly desquamation.
In the xeroderma pigmentosum variant, a mutation occurs in DNA polymerase Î·. Seven complementation groups, XPA through XPG, corresponding to defects in the corresponding gene products of XPA through XPG genes, have been described.ackground. Xeroderma pigmentosum (XP) was first described in 1874 by Hebra and Kaposi. In 1882, Kaposi coined the term xeroderma pigmentosum for the condition, referring to its characteristic dry, pigmented skin. Xeroderma pigmentosum is a rare disorder transmitted in an autosomal recessive manner.