PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 24501217-4 2014 We found decreased transcription of the Rac guanine nucleotide exchange factors Tiam1 and Vav1 in unstimulated peripheral blood CLL cells with almost complete loss of Tiam1 but increased transcription of the potential Rac antagonist RhoH. Guanine Nucleotides 44-62 vav guanine nucleotide exchange factor 1 Homo sapiens 90-94