the Kernel, ribosomes and fiber synthesis. Amino acids and a genetic code

you are: the Kernel, ribosomes and fiber synthesis

Albuminous molecules represent linear polymers of a-amino acids (fig. 2.12), connected peptidnymi communications. Peptidnaja communication the general for all fibers, is formed as a result of connection karboksilnoj groups of one amino acid with an amino group another.

The Order of inclusion of amino acids in growing polipeptidnuju a chain synthesised on a ribosome, is set by arrangement order nukleotidov in matrix RNK, attached to a ribosome that is in turn caused by sequence nukleotidov in DNA. inclusion in a chain of each separate amino acid is defined by group of three consistently located nukleotidov which name a triplet, or kodonom. For some amino acids there is only one such kodon, and for others - a little. 64 possible combinations are presented To tab. 2.1 on three nukleotida all and is specified them ' sense ' in language of amino acids (U, With, And and G mean here uratsil, tsitozin, adenin and guanin accordingly). It is considered that this code is universal, i.e. svojstven to all forms of a life.