Intracellular growth of ywtG+-ywtG::Kmr partial heterozygotes in A. culbertsoni. •, HRD340 (ywtG on chromosome-ywtG+ on vector); ▴, HRD303 (ywtG+-ywtG); ▪, HRD300 (ywtG+-blank vector); ○, HRD301 (ywtG+-Kmr cassette on vector); ▵, HRD302 (ywtG+-ywtG+); □, HRD341 (ywtG-blank vector). The experiments were repeated at least three times, and typical results are shown.