[3H]	Tritium
6-OHDA	6-hydroxydopamine
AIMs	Abnormal involuntary movements
ANOVA	Analysis of variance
AIR	Amphetamine-induced rotation
BBB	Blood-brain barrier
BBI-11008	glycosylated δ-opioid receptor agonist
βA	Beta Actin
CHO	Chinese hamster ovary
CNS	Central nervous system
DA	Dopamine
DMF	Dimethylformamide
DMSO	dimethylsulfoxide
DCM	Dichloromethane
DIC	N,N′-Diisopropylcarbodiimide
DOR	δ opioid receptor
DLS	Dorsolateral striatum
Fmoc	fluorenylmethoxycarbonyl
GABA	gamma-aminobutyric acid
Gal	Galactose
Glc	Glucose
HPLC-EC	High performance liquid chromatography with electrochemical detection
HOBT	Hydroxybenzotriazole
HRP	Horseradish peroxidase
I	Intact hemisphere
i.p.	Intraperitoneal
LAO	Limb, Axial, and Orolingual
LC-MS	Liquid chromatography with mass spectrometry detection
L-DOPA	Levodopa, L-3,4-dihydroxyphenylalanine
LID	L-DOPA-Induced Dyskinesia
KOR	κ Opioid Receptor
LX	Lesioned hemisphere
Man	Mannose
MSNs	Medium spiny neurons
MK-801	Dizocilpine, N-methyl-D-aspartate receptor antagonist
MMP-2200	Lactomorphin, glycosylated mixed μ/δ-opioid receptor agonist
MOR	μ opioid receptor
NIH	National Institute of Health
NIDA	National Institute on Drug Abuse
NMDA	N-methyl-D-aspartate
NMP	N-methylpyrrolidinone
Nle	Nor-Leucine
Nva	Nor-Valine
PD	Parkinson’s disease
PPE-A, Penk	Preproenkephalin-A
PPE-B, Pdyn	Preproenkephalin-B
TH	Tyrosine Hydroxylase