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.
Did you know that... 01 There are between 6000 and 7000 languages in the world - spoken by 7 billion people divided into 189 independent states. 02 There are about 225 indigenous languages in Europe - roughly 3% of the worldâs total. 03 Most of the worldâs languages are spoken in Asia and Africa. 04 At least half of the worldâs population are bilingual or plurilingual, i.e. they speak two or more languages.