Characterization and cytotoxic effect of hybrid peptides in HeLa, Ca Ski, and L929 cells after 2 h treatment at 37°C

CodeSequenceRP-HPLCESI-MS (M)IC50 (μM)
tR (min)Purity (%)TheoricalExperimentalHeLaCa SkiL929
1RWQWRWQWR-Ahx-RRWQWR7.096.12,567.372,567.4021.628.640.2
2RRWQWR-Ahx-RWQWRWQWR6.996.32,567.372,567.3726.748.955.5
3RWQWRWQWR-Ahx-RLLRRLLR7.897.82,675.592,675.6113.316.830.7
4RLLRRLLR-Ahx-RWQWRWQWR7.097.42,675.592,675.6016.022.442.4
5RWQWRWQWR-Ahx-QQLPSSSTSTYP7.097.72,875.442,875.46> 69.5NDND
6RWQWRWQWR-Ahx-GDALFSVPLEVY8.399.32,889.502,889.55> 69.2NDND
7RWQWRWQWR-Ahx-QVNGLGERSQQM7.098.22,926.482,926.52> 68.3NDND
8RWQWRWQWR-Ahx-KQNLAEG6.899.22,339.232,339.25> 85.4NDND
9RWQWRWQWR-Ahx-YGRKKRPQRRR6.599.13,080.743,080.7619.434.323.6
10RWQWRWQWR-Ahx-RRRRRRRR6.498.52,847.662,847.7012.855.522.3
11RWQWRWQWR-Ahx-RKKRRQRRR6.398.32,919.702,919.7217.267.725.0
12RKKRRQRRR-Ahx-RWQWRWQWR6.497.32,919.702,919.6817.116.420.2
13RWQWRWQWR-Ahx-KLALKLALK7.598.52,577.542,577.6012.071.7> 77.5
14KLALKLALK-Ahx-RWQWRWQWR7.299.22,577.542,577.5415.134.630.9
15KWQWKWQWK-Ahx-RRWQWR6.891.82,483.352,483.3814.619.66.7
16RWQWRWQWR-Ahx-KKWQWK6.998.42,483.352,483.3815.774.6> 80.5
17KWQWKWQWK-Ahx-KKWQWK6.798.22,399.332,399.3623.935.116.5
18(RWQWRWQWR)2K-Ahx-RRWQWR7.393.14,164.24,164.249.636.035.6

ND: not determined; Ahx: 6-aminohexanoic acid (magenta); RP-HPLC: reverse phase-high performance liquid chromatography; ESI-MS: electrospray ionization-mass spectrometry