The phrase "an obligatory component of" is correct and usable in written English.
It can be used when discussing something that is essential or required as part of a larger whole.
Example: "In order to complete the project successfully, understanding the budget is an obligatory component of the planning process."
Alternatives: "a necessary part of" or "an essential element of".
The internal check (peer review) is an obligatory component of any radiological service today.
Nicastrin is an obligatory component of the γ-secretase; the enzyme complex that leads to the production of Aβ fragments critically central to the pathogenesis of Alzheimer's disease (AD).
The major distinction between the two criteria is that the IDF criterion specifies an obligatory component of central obesity, which is optional in the NCEP ATP-III criterion.
An illustrative comment was 'I believe ALS training should be an obligatory component of undergraduate training… I did not get this opportunity and felt thoroughly unprepared in some situations during my first job in acute medicine' (09 04).
Great hopes were raised by the discovery that the PTP is inhibited by CsA [49 51], but it is now clear that CyPD is a key modulator but not an obligatory component of the PTP.
The observation that the Fur protein, ferric uptake regulator [ 82], is controlled by the respiratory regulators is not unexpected, because iron is an obligatory component of most respiratory complexes [ 2] and the transcriptional factor Fnr itself [ 83].
Correction of metabolic disorders is an obligatory component in treatment of the majority of the pathological processes, allowing to avoid deterioration of a condition of the patient and accordingly to reduce time of stay in a hospital.
Therefore, SDC1 is an obligatory component in the formation of this adhesion complex [ 107].
The N1 deflection in particular is an obligatory component considered to reflect the basic encoding of acoustic information of the auditory cortex [ 31, 32].
For most types of solid tumours, patient mortality and much morbidity is attributable to metastatic disease, of which invasion is an obligatory component process.
The P1 component, which is an obligatory component, is said to be an objective measure of cortical auditory function in children (Naatanen and Picton, 1987; Sharma et al., 1997).
