tuumaplasmas asuv kolmemõõtmeline kiudjate valkude võrgustik, mis annab kromatiini paiknemiseks toese, aidates sel viisil kaasa DNA replikatsiooni ja RNA transkriptsiooni toimumisele, In biology, the nuclear matrix is the network of fibres found throughout the inside of a cell nucleus and is somewhat analogous to the cell cytoskeleton. However, in contrast to the cytoskeleton, the nuclear matrix has been proposed to be a highly dynamic structure, perhaps more like a dynamic sponge with open compartments for free diffusion of molecules in the nucleus. The nuclear matrix, along with the nuclear lamina aid in organizing the genetic information within the cell.