Assertion: initiation | /r/Desires | both ptb
Facets:
Source sentences:
text: However, whereas initiation on the EMCV IRES was only weakly stimulated by PTB, initiation on the TMEV IRES depended strongly on PTB, and initiation on the FMDV IRES required both PTB and a 45kDa ITAF (ITAF 45 ).