Physical Properties: Nonpolar. Tryptophan, an essential amino acid, is the largest of the amino acids. It is also a derivative of alanine, having an indole substituent on the Î² carbon. The indole functional group absorbs strongly in the near ultraviolet part of the spectrum.ryptophan, an essential amino acid, is the largest of the amino acids. It is also a derivative of alanine, having an indole substituent on the Î² carbon.
Africa is second largest and second most populous continent in the world with a total population of 1.111 billion. African languages belong to one of the four language families: Afroasiatic, Nilo-Saharan, Niger-Congo and Khoisan.Around 2,000 languages are spoken in Africa.frica is second largest and second most populous continent in the world with a total population of 1.111 billion. African languages belong to one of the four language families: Afroasiatic, Nilo-Saharan, Niger-Congo and Khoisan.
Although only around five to fifteen million people speak Swahili as their first language, it is used as a lingua franca in much of Southeast Africa. Estimates of the total number of Swahili speakers vary widely, from 60 million to over 150 million.