FIG. 3.

MdBV-infected host hemocytes exhibit elevated levels of tyrosine phosphatase activity. Hemocyte lysates from MdBV- or mock-infected P. includens larvae were precleared of free phosphate and incubated with a synthetic tyrosine phosphopeptide (Promega). Controls consisted of MdBV- or mock-infected lysates plus the inhibitor sodium orthovanadate (I). The number of picograms of free phosphate released ± the standard error after a 30-min incubation period was then measured at 600 nm (n = 5 per treatment). Means with the same letter are not significantly different (P < 0.05) by the Tukey-Kramer multiple-comparison procedure.