The phrase "and indeed failed to" is correct and usable in written English.
It can be used to emphasize that someone or something did not succeed in a particular action or task, often following a statement of expectation or intent.
Example: "The team had high hopes for the project, but they and indeed failed to meet the deadline."
Alternatives: "and ultimately did not" or "and in fact failed to".
As to one obvious exception, the Bantu expansion southward from West Africa, Dr. Diamond said the Bantu speakers had remained in tropical Africa and had indeed failed to penetrate the temperate zones of southern Africa, meaning that they were not present at the Cape of Good Hope when the Europeans arrived.
Visiting manager Sir Alex Ferguson said prior to the match that his side may be affected by the strong winds - and they indeed failed to cope in the difficult conditions as Alan Pardew's Newcastle thrived.
And he has, indeed, failed to reverse Milan's relative decline.For one thing, Milan is shrinking--the population has fallen from 1.6m in 1981 to 1.3m today.
Engagement of NKG2D alone is not sufficient to induce the release of cytotoxic granules from resting NK cells (Bryceson et al, 2009), and freshly isolated NK cells indeed failed to kill the L-MICA-129Met or L-MICA-129Val cell lines in contrast to K562 target cells (Appendix Fig S4A and B).
Malpractice litigation has indeed failed to serve patients and their doctors.
As a small polypeptide, VCN is not expected to be immunogenic, and our preliminary animal studies showed that VCN indeed failed to elicit an antibody response following intravenous infusion.
Previous attempts to incubate purified HadAB with ISO and TAC in a cell-free assay had indeed failed to reveal any inhibition of the dehydratase by the drugs.
CMG2 isoform 2 indeed failed to reach the plasma membrane (Fig 7E) and localizes to the ER as demonstrated by immunofluorescence (Bell et al, 2001).
Using Hh and Wnt signaling pathways as examples, we find that the validation experiment indeed failed to validate some of the known pathway regulators.
