May function as a motor for intraflagellar retrograde transport. Functions in flagellar biogenesis. The cytoplasmic dynein complex 2 is probably composed by a DHC1B homodimer and a number of D1BLIC light intermediate chains. Interacts with FAP133, FLA10 and LC8. Up-regulated during flagellum biogenesis. Algae display short flagellar stumps filled with aberrant microtubules, raft-like particles and other amorphous material. Belongs to the dynein heavy chain family.