a highly basic amino-terminal sequence ( nh2-met-pro-lys-thr-arg-arg-arg-pro-arg-arg-ser-gln-arg-lys-arg-pro-pro -thr- pro ) in this protein , when fused to the amino termini of beta-galactosidase and p40x of htlv-i , acts as an autonomous signal capable of directing the hybrid proteins to the cell nucleolus .
C0007634
the
C0007609
nucleolus