"constituting a source of" is a grammatically correct phrase and can be used in written English.
It is used to describe something that is the cause or origin of something else. Example: The increasing pollution levels are constituting a source of concern for environmentalists.
It is one of the most abundant agro-industrial by-products in the Mediterranean area constituting a source of environmental problems resulting from its accumulation and disposal (Azkar et al. 2008; Hachicha et al. 2008).
Leptospires cause chronic infection in domestic and wild mammalian species that harbor the bacteria in their renal tubules, shedding them through the urine into the environment, thus constituting a source of re-infection in other animals.
During reactivation, animals may shed bacteria, thus constituting a source of infection for other animals.
During reactivation animals may shed bacteria and contaminate the environment, thus constituting a source of infection for other animals [ 10].
Moreover, EV can be recovered from body fluids and the circulation of cancer patients, thereby constituting a source of new predictive biomarkers involved in cancer development and potentially serving as an information-rich prognostic [ 63– 63].
Microvesicles and exosomes can be recovered from the blood and other body fluids of cancer patients and contain and deliver genetic and proteomic contents that reflect the cell of origin, thus constituting a source of new predictive biomarkers involved in cancer development and serving as possible targets for therapies.
Any device that accomplishes this transport of charge constitutes a source of electromotive force.
Even one surviving Jewish family would constitute "a source of bacilli touching off new infection".
Raw as well as smoked, salted, or dried fish may constitute a source of human infestation.
Optical observations constitute a source of angular measurements of a satellite pass.
Aside from their recreational use, lakes constitute a source of water for household, agricultural, and industrial uses.
