The phrase "are almost always located" is correct and usable in written English.
It can be used when discussing the typical or frequent placement of something in a specific context.
Example: "The historical artifacts are almost always located in the main exhibit hall of the museum."
Alternatives: "are typically found" or "are generally situated".
And again, the [plants] are almost always located in impoverished neighborhoods.
As to the mechanism of aberrant polyadenylation, cryptic PASs are almost always located downstream of replication-dependent histone genes and are utilized when NELF or the histone-specific processing pathway is blocked.
First discovered by Young in 1889, discoid menisci, when present, are almost always located on the lateral aspect of the knee [ 2], and medial discoid menisci are relatively rare.
The avoidance of formation of truncated proteins is further reflected in genes that are essential for life: they are almost always located in the leading strand of bacterial genomes, whatever their level of expression (Rocha & Danchin, 2003a, b).
Whatever their use, the genes that are responsible for production of individual secondary metabolites are almost always located together in the genome and are referred to as biosynthetic gene clusters.
Putative TEDs appear in a variety of domain architectures, but are almost always located at the N-termini of proteins containing secretion signals and C-terminal LPXTG cell wall-anchoring motifs (Schneewind and Missiakas, 2014).
The shelter is almost always located near the kitchen, in the center of the building, by an elevator shaft.
The capitals were almost always located near river mouths, territorial domains were invariably small, and rulers were independent of one another.
Although Benedictine monasteries were almost always located in rural regions, the labour of the monks transformed them into food-producing areas which then attracted settlement.
In contrast to depression, anxious thoughts and worry were almost always located within the individual rather than as illness or disorders warranting medical intervention.
This domain is almost always located at the C-terminus of the protein and is found in most eukaryotes (Malone et al. 1999; Starr and Fridolfsson 2010; Starr and Han 2002; Wilson and Dawson 2011).
