[Q] XZ Re-lock Bootloader without TA topic

Hi.
I was running AOSP but I just wanted to go back to stock, so I followed a tutorial (http://forum.xda-developers.com/xper...-aokp-t2458530).

I'm currently on DoomKernel v18, Android 4.2.2 (10.3.1.A.2.67).
My bootloader is unlocked but I do not have backup of TA partition, is it still possible to re-lock bootloader?