tokens: However , it is not known whether the recently identified isoforms Vav2 and Vav3 , which are broadly expressed , can couple with similar classes of receptors , nor is it known whether all Vav isoforms possess identical functional activities .
folded_tokens: however , it be not know whether the recently identify isoform vav2 and vav3 , which be broadly express , can couple with similar class of receptor , nor be it known whether all vav isoform possess identical functional activity .