Final answer:
It is true that Src and Abl are two well-characterized tyrosine kinases involved in cellular signaling pathways and have roles in cancer biology and response to chemotherapy.
Step-by-step explanation:
It is true that Src and Abl (also known as c-Abl) are two well-characterized tyrosine kinases. Both Src and Abl are crucial elements in signaling pathways within cells, which are responsible for regulating cellular processes such as growth, differentiation, and survival. The Src family of proteins includes proto-oncogene tyrosine-protein kinase Src, while Abl stands for Abelson murine leukemia viral oncogene homolog 1. These tyrosine kinases are known to become activated in response to certain growth factors and hormones and are involved in various signal transduction processes. Research, such as the study by Thottassery et al. (2006), has indicated that proteins like c-Abl can be involved in cell responses to treatment with chemotherapeutic agents, underlining their role in cancer biology.