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.

gamma-glutamyl carboxylase activity

Catalysis of the reaction: peptidyl-glutamate + reduced vitamin K + CO2 + O2 = peptidyl-gamma-carboxyglutamate + vitamin K epoxide.

B-1 B cell proliferation

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

substance K receptor binding

Binding to a substance K receptor.

neuromedin K receptor binding

Binding to a neuromedin K receptor.

potassium ion binding

Binding to a potassium ion (K+).

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.