passages.id: split_1_test_2156_passage
passages.type: progene_text
passages.text: In particular , two biochemical markers , CSF total tau ( t - tau ) protein and the 42 amino acid form of beta-amyloid ( Abeta42 ) , perform satisfactorily enough to achieve a role in the clinical diagnostic settings of patients with dementia together with the cumulative information from basic clinical work - up , genetic screening , and brain imaging .