sentence: Computational predictions of subcellular localization indicated with higher reliability that CYCB1 ;3 is localized to cytosol , chloroplast and nucleus , CYCD2 ; 1 to cytosol and nucleus , and CYCD5 ; 1 and CYCD5 ; 2 collectively to endoplasmic reticulum , chloroplast and , to a lesser extent , nucleus and mitochondrion ( Table 1 ) .