gel·sol·in 
(jĕl′sŏlĭn)
(jĕl′sŏlĭn)n.
A calcium-regulated actin-binding protein that breaks cytoskeletal actin filaments into smaller pieces, thus transforming the actin network (or gel) into a colloidal solution and influencing cell morphology, motility, and apoptosis.
[GEL + SOL4 (since it works upon actin to transform cytoplasm from a gel to a sol) + -IN.]