Abstract
Tyrosine kinase (TK) plays an important role in a variety of biological circumstances including growth, apoptosis, differentiation, immune system, angiogenesis, development, and so forth. Some inhibitors for TK have been successful in clinical applications in malignant disorders. Due to its physiological participation in cells exposed to many stimuli and to structural homology of high degree, true molecular targeting requires complete understanding of signal transduction pathways in all of the cells in which the targeted TK is involved.
