Table 1 Biological activities of antibiotics and peptides used in the study.

From: Tuneable poration: host defense peptides as sequence probes for antimicrobial mechanisms

cell

Compound

daptomycin

tetracycline

ceftriaxone

CecB

CecM

ChoC

ChoM

Minimum inhibitory concentrations, µM

P. aeruginosa

>100

<6

>25

<1.5

<1.5

<1.5

<1.5

S. aureus

<7

<0.5

<3

>100

>25

>100

<3

E. coli

>100

<1.5

<6

<1

<1.5

<6

<3

B. subtilis

<7

<0.5

<1

>50

<7

<5

<1.5

S. typhimurium

>60

<1

<1

<3

<1

>12

<3

M. luteus

<15

<0.5

<0.5

<1

<1

<1

<0.5

 

(LC50)a, µM

 

HE b

>250c

UD

UD

>250d

>250d

>250d

>250d

  1. aMedian (50%) lethal concentration. bHuman erythrocytes. c10% hemolysis. d<1% hemolysis. UD is for undetectable (>1000).