Introduction 14 17 20 30 11 14 12 27 33 4 7 9 24 26 28 34 21 Materials and methods Isolation of adult rat cardiomyocytes 1 Peptides l d d d rrrqrrkkrg 4 23 33 araqraaaray rrrqrrkkrg 33 Uptake of transducible peptides and controls 1 3 2+ 4 Fig. 1 a b c d 4 e f g Scale bar Stars arrowheads N PC NP  Microscopy, image acquisition, and analysis 2+ 2+ Results and discussion 10 1 1 WAF/CIP 33 WAF/CIP 1 13 25 35 5 18 4 23 33 1 1 1 1 1 22 29 33 2 21 2 3 6 16 31 2 2+ Fig. 2 a orange yellow b violet red CD ND green red yellow ball orange 19 15 32  3 3 3 3 Fig. 3 a b upper panel lower panel c upper panel lower panel arrow gray red light bands  1 3 3 2+ 4 4 2+ 2+ 2+ 2+ 2+ 4 Fig. 4 a top 2+ R bottom b FS t max t max c R t max t max n Double asterisk p triple asterisk p t  2+ 2+