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. [ http://zfin.org/ZDB-PUB-070221-3 ]
Synonyms: pro-B lymphocyte pro-B-lymphocyte pro-B-cell progenitor B cell
This is just here as a test because I lose it
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