Structure The molecular structure of alpha-keratin. Disulfide bonds between two alpha-helix keratin. Î±-keratin is a polypeptide chain , typically high in alanine , leucine , arginine , and cysteine , that forms a right-ha
About city. Bangui is the capital of the Central African Republic. Covering an area of 67 sq km and with an approximate population of 750,000 recorded in 2012, it is also the largest city in the country.bout city. Bangui is the capital of the Central African Republic. Covering an area of 67 sq km and with an approximate population of 750,000 recorded in 2012, it is also the largest city in the country.
1 Faustin-Archange Touadera looks on at the start of a a live television debate on 12 February 2016. 2  An African Union peacekeeping soldier takes a strategic position to quell street violence in neighbourhoods in the Central African Republicâs capital Bangui, on 20 December 2013.