MH malignant hyperthermia

MHC major histocompatibility complex

MHPG 3-methoxy-4-hydroxyphenylglycol

MKP MAP-kinase phosphatases

ML molecular layer

MLD metachromatic leukodystrophy

MMA methylmalonic acid

M-MLV Moloney murine leukemia virus

MMN multifocal motor neuropathy

Mn manganese

Mo molybdenum

MODY maturity onset diabetes of the young

MOG myelin oligodendrocyte glycoprotein

mol mole

MOP myelin oligodendrocyte protein

MOR mu opoid receptor

MPG mercaptopropionyl glycine

MPO myeloperoxidase

MPP+ 1-methyl-4-phenylpyridinium ion

MPTP 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine

Mr relative molecular mass

MRI magnetic resonance imaging

mRNA messenger RNA

MRP multidrug resistance protein

MRP multi-drum resistance associated protein

MS multiple sclerosis

MSA multiple system atrophy

MSD multiple sulfatase deficiency

MSUD maple syrup urine disease

MT microtubule

mtDNA mitochondrial DNA

MTOC microtubule-organizing center

MuSK muscle specific kinase

n nu

N nitrogen

Na sodium (NL. Natuium)

Na,K-ATPase sodium-potassium stimulated adenosine triphosphatase

Na+ sodium ion

NAAG N-acetylaspartyl glutamate

NAALADase N-acetyl alpha-linked acidic dipeptidase

NAAQS national ambient air quality standard

nAChR nicotinic acetylcholine receptor

NAD+ nicotinamide adenine dinucleotide (oxidized)

NADH nicotinamide adenine dinucleotide (reduced)

NADP+ nicotiniamide adenine dinucleotide phosphate (oxidized)

NADPH nicotinamide adenine dinucleotide phosphate (reduced)

NAG N-acetylglutamate

NALD neonatal adrenoleukodrystrophy

NANA N-acetylneuraminic acid

Nb niobium

NBQX 6-nitro 7-sulphamobenzo[f]quinoxaline-2,3-dione

NBT nitroblue tetrazolium

NC neural crest

NCAM neural cell adhesion molecule

NCAM neural cell adhesion molecule

NCL neuronal ceroid lipofuscinosis

Nd neodymium

NDF neu differentiation factor

nDNA nuclear DNA

NE norepinpherine

Ne neon

NET norepinephrine transporter

NF neurofilament or neurofibromatosis

NF-kappaB nuclear transcription factor kappa B

NFT neurofibrillary tangle

NgCAM neuroknal glial cell adhesiionmolecule

NGF nerve growth factor

NGFR nerve growth factor receptor

NHE Na+/H+ antiporters

NIPP nuclear inhibitor of protein phosphatase

NKH nonketotic hyperhlycinemia

NL nucleus laminaris an area in the chick auditory brainstem

NM nucleus magnocellularis an area in the chick auditory brainstem

NMDA N-methyl-D-aspartate

NMJ neuromuscular junction

NMR nuclear magnetic resonance

nNOS neuronal nitric oxide synthetase

NO nitric oxide

No nobelium

NOS nitric oxide synthetase

Not I primer adaptor system designed to prime first strand cDNA synthesis at the poly(A) tail of mRNAs

Not I restriction endonuclease

Np neptumium

NPY neuropeptide Y

NR-1 NMDA receptor type 1

NR-2A NMDA receptor type 2-A

NR-2B NMDA receptor type 2-B

NR-2C NMDA receptor type 2-C

NR-2D NMDA receptor type 2-D

NRD N-arginine dibasic

NRPTK nonreceptor protein tyrosine kinase

NSAID nonsteroidal anti-inflammatory drug

NSAID non-steroidal antiinflammatory drum

NSF N-ethylmaleimide-sensitive factor

NT neurotrophin

NTA nitrilotriacetate

o omicron

O oxygen

OAG 1-oleoyl, 2-acetyl sn-glycerol

OCD obsessive compulsive behavior

OCRL oculocerebrorenal syndrome

Ol oligodendrocyte

ONOO- peroxynitrate

ORF open reading frame

ORI replication origin in a plasmid

Os osmium

OTC ornithine transcarbamylase

p pi

P phosphorous

p.p.b. parts per billion

p.p.m. parts per million

P0 P zero

P0 peripheral myelin basic protein

P1 P-one

P2 P-two

PA phosphatidic acid

Pa protactinium

PACAP pituitary adenylyl cyclase-activating peptide

PAF platelet-activating factor

PAH phenylalanine hydroxylase

PAL peptidyl-a-hydroxyglycine a amidating lysase

PAM peptidylglycine a-amidating monooxygenase

PaO2 partial pressure of ambient arterial oxygen

PARP polyADP-ribose polymerase

PAS periodic acid Schiff base

Pb lead (L. plumbum)

PBN N-tert-butyl-alpha-phenyhlnitrone

PBN phenyl-tert-butylnitrone

PC phosphatidylcholine or prohormone convertase

PCA parachloroamphetamine

PCL Purkinje cell layers

PCP phencyclidine

PCP pentachlorophenol

PCPA parachlorophenylalanine

PCR polymerase chain reaction

PCr phosphocreatine

PD Parkinson's disease

Pd palladium

PDE phosphodiesterase

PDGF platelet-derived growth factor