meiotic spindle

A spindle that forms as part of meiosis. Several proteins, such as budding yeast Spo21p, fission yeast Spo2 and Spo13, and C. elegans mei-1, localize specifically to the meiotic spindle and are absent from the mitotic spindle.

B-1b B cell differentiation

The process in which B cells acquire the specialized features of B-1b B cells. B-1b B cells are B-1 cells that do not express CD5.

B-1a B cell differentiation

The process in which B cells acquire the specialized features of B-1a B cells. B-1a B cells are B-1 cells that express CD5 and arise from fetal liver precursors.

B-1 B cell proliferation

The expansion of a B-1 B cell by cell division. Follows B cell activation.

B-1 B cell lineage commitment

The process in which an immature B cell becomes committed to become a B-1 B cell.

intraciliary transport particle B binding

Binding to an intraciliary transport particle B (IFT B) complex.

obsolete pheophytinase b activity

OBSOLETE. Catalysis of the reaction: pheophytin b + H2O = H+ + pheophorbide b + phytol.

follicular B cell differentiation

The process in which a B cell in the spleen acquires the specialized features of a follicular B cell. Follicular B cells are major population of mature recirculating B cells in the spleen and are located in the B-cell follicle region.

activin B complex

A nonsteroidal regulator, composed of two covalently linked inhibin beta-B subunits (sometimes known as activin beta-B or activin/inhibin beta-B).

regulation of B-1 B cell differentiation

Any process that modulates the frequency, rate, or extent of B-1 B cell differentiation. B-1 B cells are a distinct subset of B cells characterized as being CD5 positive, found predominantly in the peritoneum, pleural cavities, and spleen, and enriched for self-reactivity.