"essential markers" is a grammatically correct phrase and can be used in written English.
It is typically used to refer to elements in a sentence that are necessary for understanding the meaning, and cannot be removed without changing the overall message. Example: The use of commas and other punctuation marks are essential markers in conveying the proper tone and emphasis in writing.
That's an extraordinary thought, that Sibelius could have written the piece without those usually essential markers of time to manage his musical imagination.
In "Sutton," his sentimental novel about the enigmatic boxman, J. R. Moehringer summons the essential markers of his subject's fabled sprees, starting with his hardscrabble boyhood in Irishtown, by the Brooklyn Navy Yard (Sutton was born in 1901), and concluding with his parole from Attica on Christmas Eve 1969.
Most of the signaling proteins and interactions in the network have been consistently identified as essential markers of the response or resistance to the selected targeted drugs in multiple cell lines, in vivo mouse models, and patient tumors.
G871C and C1177T appeared to be the most essential markers for Drosophila Lim3A expression and lifespan.
Quantitative RT-PCR analysis also failed to detect any expression of the endogenous OCT4 and NANOG, two essential markers for human pluripotent stem cells (Fig. 2C).
Cellular ATP represents one of the most common and essential markers for all live cells.
But so far, as I pointed out in a post here on the network a couple of weeks ago, the race among mid ranking providers has been to develop reputation with higher fees as an essential marker of being "reassuringly expensive".
If you consider that an eventual fourth round of United Nations Security Council sanctions is unlikely to scare the mullahs, then Congress's version — hard-edged or a softball — will serve as an essential marker to the world of American intentions on Iran.
The shepherding of livestock on open pastures is an essential marker of pastoralist management.
Proviral load quantification of human T-lymphotropic virus type 1 (HTLV-1) is an essential marker for disease progression.
New automated and ultrasensitive assays are becoming available to monitor HIV-1 plasma viral load, which is an essential marker for the clinical follow-up.
