Figure 2From: Metazoan-like signaling in a unicellular receptor tyrosine kinasePeptide phosphorylation by purified RTKB2 kinase. The enzymatic activity of RTKB2 (1 μM) towards four synthetic peptides (750 μM) was measured using the phosphocellulose paper binding assay. Reactions were carried out for 15 minutes at 30°C. Error bars indicate standard deviations.Back to article page