Perfectly legitimate (not stupid) question. Products containing protein will say protein in the ingredients - either just as protein, as hydrolized protein, as amino acids, and possibly other things (I'm not sure if panthenol is protein).
Among those you mentioned, I use Curl Junkie Curl Rehab. It doesn't have protein. It's great for moisturizing.
Not sure about the other two, so you will want to check the labels.
Also, if they are listed in the products section of this website, I think each product states whether it has protein. Good luck with this!
ETA: Since you are using Curl Junkie products (I think they are great) you might want to use their Repair Me if you are looking for a protein boost. Be sure to follow it with more moisture. Even though the Repair Me is unique because it is protein and moisture, I always think it's a good idea to follow protein with moisture. The Curl Rehab that you have would be excellent for that.
2/c and some 3A. Modified CG.
Highly porous. Color over grey.
Best 1st day method: Super Soaker
Conditioners: Curl Junkie Beauticurls Strengthening Conditioner,
Deep condish: Curl Junkie Curl Rehab
Stylers: Experimenting with cones & sulfates while the dews are high. Sometimes try roller sets - classic glamor but I prefer my curls.
Every day is a gift