part of part of lacks_plasma_membrane_part has plasma membrane part capable of has high plasma membrane amount mature B cell marginal zone B cell of spleen MZ B lymphocyte marginal zone B cell MZ B cell marginal zone B-cell marginal zone B-lymphocyte MZ B cells are reportedly CD1-positive (mice), CD20-positive, CD48-positive, CD84-positive, CD150-positive, CD229-positive, and CD352-positive. marginal zone B lymphocyte marginal zone of spleen B cell A mature B cell that is located in the marginal zone of the spleen with the phenotype CD23-negative and CD21-positive and expressing a B cell receptor usually reactive to bacterial cell wall components or senescent self components such as oxidized-LDL. This cell type is also described as being CD19-positive, B220-positive, IgM-high, AA4-negative, CD35-high. B cell of marginal zone of spleen MZ B-cell MZ B-lymphocyte splenocyte defense response to bacterium IgM immunoglobulin complex membrane-spanning 4-domains subfamily A member 1 complement receptor type 2 low affinity immunoglobulin epsilon Fc receptor complement component C1q receptor marginal zone of spleen