Table 1: Some CPPs and their physical properties. aHydrophobicity calculated according to the values from von Heijne scale [10].

PeptideNo. of argininesNo. of lysinesHydrophobicity No. of residuesSequenceTotal charge

R9 [11]92.589RRRRRRRRR
TAT(48–60) [4]622.3713GRKKRRQRRRPPQ
Penetratin [7]341.5216RQIKIWFQNRRMKWKK
Pen-Arg [12]71.4916RQIRIWFQNRRMRWRR
pVEC [13]421.1018LLIILRRRIRKQAHAHSK
M918 [14]70.9322MVTVLFRRLRIRRACGPPRVRV
TP10 [15]40.5321AGYLLGKINLKALAALAKKIL