human_reference_atlas has characterizing marker set has marker component BFSP2 primary lens fiber An elongating cell that rapidly obliterates the lumen of the lens vesicle. Subsequently, differentiation of this cell type at the lens equator leads to the formation of secondary fiber cells that come to overlie the primary fibers. CT primary lens fiber 2010-09-07T11:19:01Z FMA:70613 primary lens fiber CL:0002228 primary lens fibre lens fiber cell Homo sapiens sequence collection lens of camera-type eye eye lens fiber