PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
9692880-4	1998	Possession of a Valpha chain which is inefficiently positively selected appears to increase the likelihood that a second Valpha chain will be co-expressed, whilst the relative cell surface levels of a given pair of Valpha chains differ between CD4 and CD8 subsets.	valpha	16-22	CD4 antigen	Mus musculus	244-247