This family consists of several eukaryotic SF-assemblin and related beta giardin proteins. During mitosis the SF-assemblin-based cytoskeleton is reorganised; it divides in prophase and is reduced to two dot-like structures at each spindle pole in metaphase. During anaphase, the two dots present at each pole are connected again. In telophase there is an asymmetrical outgrowth of new fibres. It has been suggested that SF-assemblin is involved in re-establishing the microtubular root system characteristic of interphase cells after mitosis [1].

1: SF-assemblin in Chlamydomonas: sequence conservation and localization during the cell cycle. Lechtreck KF, Silflow CD; Cell Motil Cytoskeleton 1997;36:190-201. PMID:9015206

2: SF-assemblin, the structural protein of the 2-nm filaments from striated microtubule associated fibers of algal flagellar roots, forms a segmented coiled coil. Weber K, Geisler N, Plessmann U, Bremerich A, Lechtreck KF, Melkonian M; J Cell Biol 1993;121:837-845. PMID:8491776