The phrase "axis is required" is correct and usable in written English.
It can be used in contexts where specifying the necessity of an axis in a diagram, graph, or mathematical context is important.
Example: "In order to properly analyze the data, it is essential to note that an axis is required for the graph."
Alternatives: "an axis is necessary" or "an axis must be included".
Wang, D. et al. A CD8 T cell/indoleamine 2,3-dioxygenase axis is required for mesenchymal stem cell suppression of human systemic lupus erythematosus.
Tan, W., Martin, D. & Gutkind, J. S. The Galpha13-Rho signaling axis is required for SDF-1-induced migration through CXCR4.
No orthogonal accuracy between the three axes (two rotation axes and the laser axis) is required, i.e. the three parts of the sensor unit (two rotary tables and the laser range finder) need not be assembled orthogonally, which lowers the barrier to manufacture it.
This study was designed to test the hypothesis that an intact GH/insulin-like growth factor 1 (IGF-1) axis is required for normal myocardial infarction healing.
If a beam is strongly convergent or divergent, a large angular range on the angular axis is required to fully describe the beam of a large angle cone.
Consequently, the maximum load is observed at the position of segment No. 3. Further research about the relationship between axial forces and neutral axis is required.
Taken together, components of the MST1/2-SAV-MOB1-LATS1/2-YAP/TAZ ares arequiredred to prevent pathological conditions that are not related to tumour formation (Tables 1 and2).
As outlined in detail in Doornbos et al. (2010) and Doornbos (2011) and in Subsection 3.2, the calibration parameters for the X axis are required to start an iterative procedure for obtaining the calibration parameters for the Y and Z axes together with mass density and wind values.
Therefore, the data suggest that both functional LTβR and TNFR2 axis are required for the development of microvascular pathology resulting in fatal ECM.
Consequently, either more cells or cells stretched in a direction perpendicular to the PD axis are required to encompass this larger surface area at the periphery.
The purple arrows indicate approximate rotations needed to transform magenta monomers of non-native dimer 1 to corresponding monomers of either the native dimer or non-native dimer 2. In the latter case, two successive rotations about (i) an axis perpendicular to the plane of the paper and subsequently about (ii) a vertical axis are required.
