β Scribed by V.I. Shcherbak
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
The function of DNA is to specify protein sequences. The four-base "alphabet" used in nucleic acids is translated to the 20 base alphabet of proteins (plus a stop signal) via the genetic code. The code is neither overlapping nor punctuated, but has mRNA sequences read in successive triplet codons un
The main theories which have been suggested to explain the origin of genetic code organization are discussed. The coevolution theory, which considers the genetic code as a map of the biosynthetic relationships between amino acids, seems to be based on a mechanism that links it closely to certain sta
A model for topological coding of proteins is proposed. The model is based on the capacity of hydrogen bonds (property of connectivity) to "x conformations of protein molecules. The protein chain is modeled by an n-arc graph with the following elements: vertices ( -carbon atoms), structural edges (p
We argue that a primitive genetic code with only 20 separate words explains that there are 20 coded amino acids in modern life. The existence of 64 words on the modern genetic code requires modern life to read almost exclusively one strand of DNA in one direction. In our primitive code, both the ori