Term Name:	pro-B cell
Synonyms:	pre-B cell (Philadelphia nomenclature), pre-pro B cell, pro-B lymphocyte, pro-B-cell, pro-B-lymphocyte, progenitor B cell, progenitor B lymphocyte, progenitor B-cell, progenitor B-lymphocyte
Definition:	A progenitor cell of the B cell lineage, with some lineage specific activity such as early stages of recombination of B cell receptor genes, but not yet fully committed to the B cell lineage until the expression of PAX5 occurs.
Ontology:	Cell Ontology [CL:0000826]