Makes internal radiation sources also use apply_effect(), by utilizing the ability to ignore radiation protection.

code/game/objects/items/weapons/dna_injector.dm

@@ -65,7 +65,8 @@
 
 /obj/item/weapon/dnainjector/proc/inject(mob/M as mob, mob/user as mob)
 	if(istype(M,/mob/living))
-		M.radiation += rand(5,20)
+		var/mob/living/L = M
+		L.apply_effect(rand(5,20), IRRADIATE, check_protection = 0)
 
 	if (!(NOCLONE in M.mutations)) // prevents drained people from having their DNA changed
 		if (buf.types & DNA2_BUF_UI)