The phrase "are directly bound" is correct and usable in written English.
It can be used in contexts where you want to indicate a direct connection or relationship between two entities or concepts.
Example: "The two variables are directly bound, meaning that any change in one will affect the other."
Alternatives: "are closely linked" or "are tightly connected."
The residues of this element essential for rapid Htt aggregation are directly bound by TRiC.
The obtained data shows that, first, the sorbed water molecules are directly bound to the hydrophilic site to form non-freezable water.
The most egregious get litigated through FIRE's two-year-old litigation program, which targets violations at public colleges (only public institutions, which are arms of the government, are directly bound by the First Amendment).
Two elements important for amplification of the third chromosome chorion gene cluster, ACE3 and Ori-beta, are directly bound by Orc (origin recognition complex), and two-dimensional gel analysis has revealed that the primary origin used is Ori-beta (refs 7-9).
Reverse-transcribed viral DNAs are directly bound by PQBP1 that interacts with cGAS to trigger the STING-IRF3 signaling pathway.
The ability to identify directly bound ligands also provides a means to determine whether active compounds identified in compound screens are directly bound and unmodified.
Therefore, they may be directly bound or indirectly bound via another component of the adherens junction complex.
With sufficient impact energy, CNTs can be directly bound on the substrate without any polymer binder, catalyst, or chemical treatment.
Those communication ports will be directly bound to the reconfigurable interconnection matrix of the core.
On the other hand, under a physiological environment where the graphene surface was directly exposed to electrolyte solutions, ion species were directly bound to the defect sites by means of strong chemisorption [32].
The M13KO7 bacterial virus was used as a model system to determine if the large (approximately 2 μm in length; 16,400 kDa) M13KO7 could be directly bound to and detected on the PSi BSW/BSSW sensor surface.
