HIV-1 -infected individuals have , on average , abnormally high levels of tumour necrosis factor alpha ( TNF alpha ) and abnormally low plasma cysteine levels .
hiv-1 -infected individuals have , on average , abnormally high levels of tumour necrosis factor alpha ( tnf alpha ) and abnormally low plasma cysteine levels .
B-virus O O O O O O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule I-protein_molecule O O O O B-other_name B-amino_acid_monomer O O