The phrase "although not understood" is correct and usable in written English.
It can be used to indicate that something is not comprehended, often in a context where understanding is expected or desired.
Example: "The theory was fascinating, although not understood by the majority of the audience."
Alternatives: "even if it is unclear" or "despite the lack of understanding".
Seeming to have anticipated, although not understood, the feminist reaction this kind of sentiment generally evokes, he finishes the tweet: "If you think that's an endorsement of date rape, go away and learn how to think".
Although not understood in detail, the molecular pathways that operate in ERG+ tumors are relatively better described than the mechanisms involved in development/progression of ERG− PCs [ 11].
Although not understood in detail, this positive feedback loop is believed to intensify the level of Kras signalling up to a threshold necessary for transformation of pancreatic acinar cells (Ardito et al, 2012; Navas et al, 2012).
Although originally not understood during the following centuries, the decrepitation property of lead II) nitrate led to its use in matches and special explosives such as lead azide.
Although clearly not understood, nesprins have misregulated isoform expression in certain cancers, which indicates two things (Refs 73, 82, 83, 84).
Size seems to trigger molting in lepidopterans (moths, butterflies), although the mechanism is not understood.
How Plasmodium infection negatively impacts GCs is not understood, although parasite factors are likely to play a central role2,4.
The exact mechanisms are still not understood, although several have been proposed.
The mechanism underlying PQ tolerance is not understood, although host and parasite genetic factors are implicated.
The rearrangement of chlorines on the biphenyl rings was clearly observed in this study, although the mechanism is not understood.
The molecular mechanisms permitting mitochondrial tubulation are still not understood although they are under active investigation [ 16, 17].
