lacks_plasma_membrane_part develops from has high plasma membrane amount has low plasma membrane amount plasma cell long lived plasma cell short lived plasma cell immunoglobulin complex MHC class II protein complex CD19 molecule C-X-C chemokine receptor type 4 membrane-spanning 4-domains subfamily A member 1 ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase 1 syndecan-1