Some tyrosine receptor kinases (e.g., the platelet-derived growth factor receptor) can form heterodimers with other similar but not identical kinases of the same subfamily, allowing a highly varied response to the extracellular signal.
Algunhas quinases receptoras de tirosina (por exemplo, o receptor do factor de crecemento derivado de plaquetas) poden formar heterodímeros con outras quinases similares pero non idénticas da mesma subfamilia, o que permite unha resposta moi variada aos sinais extracelulares.