Table 3.

Summary of the surface phenotype of KIV and conventional plasmablasts

KIVsConventional plasmablasts
CD19 Heterogeneous (∼25% positivity) Uniformly low 
CD20 Heterogeneous (∼5% positivity) Negative 
CD38 100% high positivity 100% high positivity 
IgM 100% high positivity Heterogeneous (∼20% positivity) 
κ/λ Monotypic λ (100% high positivity) Balanced κ/λ ratio (60/40%) 
CD27 Heterogeneous (∼25% positivity) 100% high positivity 
CD40 Low/negative Heterogeneous 
CD70 Heterogeneous (6% positivity) Negative 
CD86 Heterogeneous (10% positivity) Mostly positive 
CD137L Negative Negative 
OX40-L Negative Negative 
ICOS-L Negative Negative 
BAFF-R Negative Negative 
PD-L1 Negative Negative 
KIVsConventional plasmablasts
CD19 Heterogeneous (∼25% positivity) Uniformly low 
CD20 Heterogeneous (∼5% positivity) Negative 
CD38 100% high positivity 100% high positivity 
IgM 100% high positivity Heterogeneous (∼20% positivity) 
κ/λ Monotypic λ (100% high positivity) Balanced κ/λ ratio (60/40%) 
CD27 Heterogeneous (∼25% positivity) 100% high positivity 
CD40 Low/negative Heterogeneous 
CD70 Heterogeneous (6% positivity) Negative 
CD86 Heterogeneous (10% positivity) Mostly positive 
CD137L Negative Negative 
OX40-L Negative Negative 
ICOS-L Negative Negative 
BAFF-R Negative Negative 
PD-L1 Negative Negative 

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