Figure 2. Relative Amount of Procyclin mRNA in Different Life Cycle Stages.

RTQ-PCR was performed on RNA samples from bloodstream forms and midgut and salivary gland trypanosomes at various days post infection. β-tubulin was used as an internal control. The ratio of procyclin/tubulin mRNAs in a reference culture of procyclic forms was set at 1. Standard deviations derive from two to five replicas. RNA derived from independent infections (days 11–24) was quantitated separately.