The phrase "availability and levels of" is correct and usable in written English.
It can be used when discussing the presence and varying degrees of something, often in contexts like research, resources, or services.
Example: "The availability and levels of support for mental health services vary significantly across different regions."
Alternatives: "accessibility and extent of" or "presence and degree of".
Interestingly, NADH and NADPH de novo synthesis in the presence of l-tryptophan complemented the availability and levels of reducing cofactor-dependent alcohol production and opened the valve of the carbon flux selectively to synthesize butanol.
Additionally, the effect of biohydrogenation of unprotected supplementary fat in the rumen was not any different between supplemented and control group of cows [ 44, 45], hence the availability and levels of substrates necessary for glucose metabolism were similar in all cows.
Indeed, this putative effect on protein trafficking could also mediate effects of Vangl2Lp through PCP-independent pathways, as suggested by the finding that Vangl2 regulates the cell-surface availability and levels of MMP14 in migrating cells during gastrulation (Williams et al., 2012).
Rather than entering into discussion regarding the definition of the quality, we decided to define it based on presence or absence of information, availability and level of evidence of references, type and number of misleading claim and proportion of advertisements compliant with code or guidelines and the presentation of risk results.
The availability and level of precision of patient utilization data usually differs between cost items.
The organisation, availability and level of education of staff and availability of additional resources differ across settings and countries [ 27].
Depending on the availability and level of data obtained from national databases some comparisons will be carried out.
Tools for the de-identification of genomic data are mostly at the research stage and their general availability and level of support is unknown.
Information on workforce industry was generally classified in the LIS datasets according to international standards, such as the International Standard Industrial Classification of all Economic Activities or the General Industrial Classification of Economic Activities within the European Communities, although the variable's availability and level of detail varied across surveys.
Acetylation of histones is dependent on the availability of acetyl-CoA, and levels of acetyl-CoA can fluctuate as much as 10-fold;, its metabolism primarily reflects the abundance of glucose and the flux through glucose metabolic pathways.
56 The six-item scale describes perceived aesthetic quality of the area, walkability of the environment, the availability of healthy foods, and levels of safety, violence and social cohesion within the neighbourhood.
