Hox gene is an example of a homeobox gene. The homeobox sequence codes for a 60 amino acid protein domain known as the homeodomain. The main role of homeodomain is to act as a switch that controls gene transcription. See also: Hox gene.
Guanine /ËÉ¡wÉËnÉ¨n/ (G, Gua) is one of the four main nucleobases found in the nucleic acids DNA and RNA, the others being adenine, cytosine, and thymine (uracil in RNA). In DNA, guanine is paired with cytosine. With the formula C 5 H 5 N 5 O, guanine is a derivative of purine, consisting of a fused pyrimidine-imidazole ring system with conjugated double bonds. Being unsaturated, the bicyclic molecule is planar. The guanine nucleoside is called guanosine.
Guanine of one strand always forms three hydrogen bonds with cytosine of otheâ¦r strand and Adenine forms two hydrogen bonds with Thymine of other strand. So to maintain the double helical structure of DNA. number of guanine is equal to cytosine and number of adenine is equal to thymine.