Summary of the surface phenotype of KIV and conventional plasmablasts
| . | KIVs . | Conventional 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 |
| . | KIVs . | Conventional 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 |