The phrase "acting as intermediates" is correct and usable in written English.
It can be used in contexts where you are describing entities or factors that facilitate or mediate a process or interaction between two or more parties.
Example: "In the chemical reaction, the catalysts are acting as intermediates to speed up the process without being consumed."
Alternatives: "serving as mediators" or "functioning as go-betweens".
Also, adhesion molecules such as laminin and the 37/67 kDa laminin receptor have been shown to interact with PrPC [15] [17], with heparan sulphated molecules acting as intermediates [18].
While P. Bodies represent discrete mRNA decay/storage foci found in all cell types [6], [7], SGs are formed only under conditions of stress and function as dynamic mRNA sorting centres, acting as intermediates between polysomes and P. Bodies [8].
This forces us to revisit Darwinian evolution by considering that ncRNAs can indeed improve fitness through selection by acting as intermediates in evolution.
Snails of the families Planorbidae, Bulinidae and Lymnaeidae acting as intermediate hosts [3].
The virtual Bobber-agents are used to guide each vehicle toward the appropriate queue, by acting as intermediate targets.
The localized states of the rough WL acting as intermediate states was proposed as an explanation to the observed PL up-conversion, seen in single InAs/GaAs QDs [8].
Nematodes of the family Anisakidae are parasites of many fishes and aquatic invertebrates which acting as intermediate or paratenic hosts, while mammals and fish-eating birds are definitive hosts.
The first one corresponds to reaction via solution and leads to the formation of ferric products such as goethite or lepidocrocite (oxidation) or to the release of FeII ions into the solution (reduction) with soluble FeII FeIII complexes acting as intermediate species.
When mosquitoes, acting as intermediate hosts, alight upon a human host and take a blood meal, they ingest a number of Mf from the definitive host, some or all of which may develop within the mosquito into L3 larvae.
Dogs are the primary definitive hosts for this parasite, with livestock acting as intermediate hosts and humans as aberrant intermediate hosts.
Both include species acting as intermediate host for species of the blood-fluke Schistosoma which cause a public health problem in East Asia.
