raku tsütoplasmas asuv türosiinkinaas, mis paikneb rakk-maatriks ühenduskohas (kesksetes e fokaalsetes ühendustes), kus ta on seotud integriinide tsütoplasmas asuva sabaosaga, Focal adhesion kinase (FAK) is a cytoplasmic tyrosine kinase that plays critical roles in integrin-mediated signal transductions and also participates in signaling by other cell surface receptors.