The binding of the SCF homodimer induces dimerization and phosphorylation of the KIT receptor, which can promote the differentiation, proliferation, maturation, and/or enhanced survival of cells in the MC lineage. SCF-KIT interactions can also activate MCs to express cellular functions and promote MC migration, chemotaxis, and adhesion, and, at high concentrations, MC degranulation and mediator release. P: phosphorylated tyrosine