Phosphorylation of fructose bisphosphate aldolase in Trypanosoma brucei.

Methods were developed for in vivo labelling of trypanosome proteins with inorganic phosphate and the labelling of fructose bisphosphate aldolase and variant surface glycoprotein was investigated. It was found that the large pool size of phosphate in trypanosomes precludes detailed kinetic analyses. Aldolase contains low levels of phosphoserine but the function of this phosphorylation has yet to be determined.