Kinesin is a microtubule-associated force-producing protein that may play a role in organelle transport. The light chain may function in coupling of cargo to the heavy chain or in the modulation of its ATPase activity. Oligomeric complex composed of two heavy chains and two light chains. Additional isoforms seem to exist. The light chain is composed of three structural domains: a large globular N-terminal domain which may be involved in binding to kinesin heavy chains, a central alpha-helical coiled-coil domain that mediates the light chain dimerization; and a small globular C-terminal which may play a role in regulating mechanochemical activity or attachment of kinesin to membrane-bound organelles. Phosphorylation may modulate the process of mechanochemical coupling. Belongs to the kinesin light chain family.