Specifically, they identify the Ser2 CTD kinase Cdk9, a subunit of the positive elongation factor P-TEFb, as the likely biological target of Pgc function [5].
Two key selection parameters for a biological target are its biochemical function and localization, which alter the strategy for identifying candidate radiotracers and influence the information obtained from the radiotracer target interaction.
Although disordered when alone in solution, in many cases, IDPs undergo conformational transitions to folded states upon binding their biological targets to perform functions [59].
The biological "target" of the drug and its function in the pathophysiology of the disease should be known [ 11- 13].
To further identify the biological networks and functions in which these target genes are involved, the target gene list for each miRNA was analyzed using IPA (Table 2).
Although other sirtuins, including the mitochondrial sirtuins SIRT3, SIRT4 and SIRT5 and the nuclear sirtuins SIRT6 and SIRT7, may have important roles in cytoprotective functions, their molecular targets and biological functions, and possible roles in renoprotection, are largely unknown.
In some specific physiological status, natural or artificial molecules are used to interact with selective biological targets to activate or inhibit their functions to achieve expected biological and physiological output.
Marine natural products often have complex structures and potent biological activities; however, little is understood regarding how their molecular structure correlates with function or what biological targets or pathways are involved.
