ABA	abscisic acid
BBX	B-box protein
CDD	conserved domain database
DBB	double B-box
DRE	osmotic-responsive element
LTRE	cold-responsive element
MeJA	methyl jasmonate
MW	molecular weight
MYA	million years ago
PEG	polyethylene glycol 6000
pI	isoelectric point
Ptr	Populus trichocarpa
SA	silica acid
FM	female catkins, prior to seed release
F	female catkins, post-fertilization
M	male catkins
ML	mature leaf
REF	washed fibrous roots
RTC	roots from plants in tissue culture
AxB	axillary bud
YFB	newly initiated female floral buds
YMB	newly initiated male floral buds
Xylem1	developing phloem
PC	phloem, cortex, epidermis
Phloem3	developing phloem/cambium