Hi everyone, I would like to draw an illustration like this, but not sure what siftware was used and what drawing style this is. Can you suggest video tutorials to draw like this?
This loads protein database 3D models into 3D applications such as Cinema4D or Blender. Quite likely you will find ready made models of TCL/CAR among many others. If you have the patience to work with 3D applications the field of medical visualisation is very interesting. It is also possible to create 3D visualisations of MRI and CT scans by extracting 3D models from Weasis/Dicom viewer https://weasis.org/en/index.html
Seems to be a digital illustration, not a 3D rendering. Different "handmade" drawings later combined into one illustration. This style can be achieved with any kind of 2D graphic software, such as Photoshop, Procreate or free alternatives like Gimp and Infinite Painter.
Try to watch tutorials about medical illustration like this: