Some theoretical questions of the peptide and steroid hormone regulation. Part II.: The second messenger system

The "second messenger system" has been analysed regarding its possibilities for containing and transferring highly specific molecular, biological information. Very heterogeneous molecules were found behind the different - cyclase, diesterase, kinase,... - activities of the system, whereas the connection realized between them by cyclic nucleotides was very poor. So, I constructed a theoretical model mostly on the basis of real and known experimental facts to resolve this obvious contradiction and make the second messenger system adequate as a highly specific biological informational channel.