CDR	complementarity-determining region(s)
CMFDA	5-chloromethylfluorescein diacetate (CellTracker Green)
enh	VHH specific for GFP (enhancer)
FA	formaldehyde
FACS	fluorescence-activated cell sorting
FR	framework region(s)
GFP	green fluorescent protein
HA	hemagglutinin
HRP	horseradish peroxidase
IP	immunoprecipitation
KO	knockout
M1	matrix protein 1
MHCII	major histocompatibility complex class II
NP	nucleoprotein
PBS	phosphate buffered saline
PBSB	PBS, 2% BSA
PBSI	PBS, 2% ICS
PBSMT	PBS, 4% milk, 0.1% Tween-20
PE	phycoerythrin
scFv	single-chain variable fragment(s)
SMM	0.5 M sucrose, 20 mM maleate, 20 mM MgCl2 (pH 6.5)
SrtA	staphylococcal housekeeping sortase A
TAMRA	5-carboxytetramethylrhodamine
TBSMT	Tris buffered saline, 5% milk, 0.1% Tween-20
VHH	single-domain antigen recognition fragment(s) from camelid heavy chain-only antibodies
WT	wild type
Xc	staphylococcal protein A constant region (amino acids 421–516)
Xr	staphylococcal protein A repetitive region (amino acids 324–420)