Effect of peptides against NDV. Cyclic, linear and FP-P1 at 100 μM concentrations were analysed for their inhibitory ability against NDV in embryonated chicken eggs. Viral titers in the allantoic fluid were measured as HA units. Results are shown as the mean of three independent experiments and error bars represent the standard deviation of the mean. None of the peptides showed a statistically significant result (ANOVA, p = 0.596).