The phrase "availability appears to limit" is correct and usable in written English.
You can use it when discussing how the availability of a resource or option seems to restrict or constrain something.
Example: "In this study, we found that availability appears to limit the choices consumers make when selecting products."
Alternatives: "availability seems to restrict" or "availability appears to constrain".
Downregulation of poplar C3H-3, which provides a key entry into the production of the major, methoxylated, monolignols, therefore appears to limit the overall availability of monomers required for lignification.
Precursor availability appears to be the limiting factor in ethyl ester biosynthesis (Saerens et al. 2008) since the addition of hexanoic or octanoic acid to the fermentation medium causes a strong increase in the formation of the corresponding ethyl ester (Saerens et al. 2006).
However, the availability of carbohydrate in elicitor-treated opium poppy cells does not appear to limit alkaloid production since the augmentation of carbohydrate in the culture medium has been reported not to improve sanguinarine accumulation [ 17].
Light availability appears to be an important limiting factor for phytoplankton production.
In the mouse, limiting tryptophan availability appears to be an important mechanism by which the local microenvironment can influence the outcome of T cell activation [ 13].
The genetic studies carried out with this strain indicate that diacylglycerol (DAG) availability appears to be one of the main limiting factors to achieve higher yields of the storage compound.
In M. oryzae, nitrogen availability appears to regulate pathogenicity.
Klee et al. [ 18] indicated that all of the apocarotenoid volatile QTLs identified to date are associated with carotenoid biosynthetic enzymes, and substrate availability rather than enzyme synthesis appears to be limiting apocarotenoid volatiles.
Their duration of benefit and availability appears limited at the biological level, a constraint not seen with therapies for other disease conditions.
