TgESTzye01c10.x1 TgME49 B7 Tachyzoite cDNA Library 1 Toxoplasma gondii cDNA clone TgESTzye01c10.x1 3' similar to SW:RPBX_SCHPO O13877 DNA-DIRECTED RNA POLYMERASES I, II, AND III 8.3 KD POLYPEPTIDE, mRNA sequence