Published in April 1978, this issue follows a classic Silver Age-style plot involving parallel universes and a brand-new hero.
ZXDL (or ZXDC) is a transcription factor that plays a critical role in the human immune system and cellular development. Biological Function zxdl 153
To make sure this "deep post" hits the right note, could you tell me a little more about what it refers to? It might be: A Personal Code: Published in April 1978, this issue follows a