Ann Pennington (December 23, 1893 – November 4, 1971) was an actress, dancer, and singer who starred on Broadway in the 1910s and 1920s, notably in the Ziegfeld Follies and George White's Scandals. She became famous for what was, at the time, called a "Shake and Quiver Dancer", and was noted for her variation of the "Black Bottom". She also was noted as an accomplished tap dancer. Ray Henderson wrote the extant version of "Black Bottom" for Ann – she had already been performing the popular version of the dance for some time. Some years prior to this, she had also topped the bill on Broadway in her performance of the musically similar "Charleston".

Eleidin is clear intracellular protein which is present in the stratum lucidum of the skin. Eleidin is a transformation product of the amino acid complex keratohyalin, the lifeless matter deposited in form of minute granules within the protoplasm of living cells. Eleidin is then converted to keratin in the stratum corneum. Eleidin can be found in the vermilion border of the lip. The lip is thinly keratinized and has a high concentration of eleidin. The red appearance of the vermillion border is due to several factors, one of which is the transparent nature of eleidin showing the color of the red blood cells beneath.
Eleidin is clear intracellular protein which is present in the stratum lucidum of the skin. Eleidin is a transformation product of the amino acid complex keratohyalin, the lifeless matter deposited in form of minute granules within the protoplasm of living cells. Eleidin is then converted to keratin in the stratum corneum.

Ann Pennington (December 23, 1893 – November 4, 1971) was an actress, dancer, and singer who starred on Broadway in the 1910s and 1920s, notably in the Ziegfeld Follies and George White's Scandals. She became famous for what was, at the time, called a "Shake and Quiver Dancer", and was noted for her variation of the "Black Bottom". She also was noted as an accomplished tap dancer. Ray Henderson wrote the extant version of "Black Bottom" for Ann – she had already been performing the popular version of the dance for some time. Some years prior to this, she had also topped the bill on Broadway in her performance of the musically similar "Charleston". Pennington also achieved fame as a star of both silent and sound motion pictures.