A temperature-sensitive mutant of the zyg gene. zyg-1(oj7), zyg-1(b1), zyg-1(it4), zyg-1(it37) are alleles of zyg-1 gene, each one resulting in temperature sensitive mutations. C. elegans II, p.1046
System of protein polymers in the cytoplasm of a eukaryotic cell that provide structural integrity and the capacity for directed movement. The most abundant components are actin filaments, microtubules, and intermediate filaments.