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A-B-C-D-E-F-G-H-I-J-K-L-M-N-O-P-Q-R-S-T-U-V-W-X-Y-Z

L

lac operon
[Discussion] [using it to detect mutations in mice] [using it to detect cell-specific gene expression]
lac repressor
[Discussion] [isolating by affinity chromatography]
Lactase
Lacteal
Lactose
Lagging strand (DNA)
Lamarck, J-B
Laminins
Lamins
Larva
Immature stage of many animals that must undergo metamorphosis to become an adult. [trochophore larva] [insect larva]
Latent period
Lateral geniculate nucleus (LGN)
[human] [in visual processing]
Laurasia
Laurasiatheria
LD50
[ of insecticides ]
LDL (low-density lipoprotein)
Leaf
[structure] [gas exchange in]
LEAFY protein
Learning
Legume
A member of a family of pod-bearing plants that includes peas, beans, clovers, alfalfa (lucerne), and so on. [and symbiotic nitrogen fixation]
Lens of human eye
Lenticels
Leptin
Leptotene
Leucine
Leukemia
A cancer characterized by the uncontrolled proliferation of a clone of leukocytes circulating in the blood. Compare with Lymphoma.
[Chronic Myelogenous Leukemia (CML)] [Chronic Lymphocytic Leukemia (CLL)] [Acute Lymphoblastic Leukemia (ALL)]
Leukocyte
Leukotrienes (LTs)
[ inhibitors for treating asthma ]
Lewis, E. B.
LFA-1 (Leukocyte Function-associated Antigen-1)
LH (Luteinizing hormone)
Licensing factors
Lichens
Liddle's syndrome
Ligaments
Ligand
A molecule that binds to another molecule or to a cell.
Light-harvesting complexes (LHCs)
Lignin
Complex polymer found in the cell walls of many types of plant cells, e.g., sclerenchyma and xylem, providing mechanical strength.
Limbic system
Limiting dilution analysis
Limnetic zone
LINES (Long Interspersed Elements)
Lineweaver-Burk plot
Linkage
Tendency of two genes to be inherited together because they are located on the same chromosome. [Discussion]
Lipase
Lipids
Hydrophobic organic molecules such as triglycerides (fats and oils) and some steroids. [serum lipids]
Lipopolysaccharide (LPS; also known as endotoxin)
Lipoprotein
Listeria monocytogenes
Littoral zone
Liver
[hormones of] [physiology]
Liverworts
Lizard, heart of
Locus
The position that a gene occupies in a DNA molecule or the chromosome containing that DNA. [Example]
Logistic growth curve
Long-term
depression (LTD)
facilitation
potentiation (LTP)
sensitization
Long Terminal Repeats (LTRs)
Loop of Henle
Lophotrochozoans
Lorenz, K.
Lorenzo's Oil
Loss of heterozygosity (LOH)
Lovastatin
LPS (lipopolysaccharide; also known as endotoxin)
Luciferase
Lumen
The cavity inside a tubular structure such as a blood vessel or kidney tubule.
Lung cancer
Lungs
[human] [other vertebrates]
Luteinizing hormone (LH)
Lycopsids
Lyme disease
Lymph
Lymph nodes
Lymphocyte
[ T cells and B cells ]
Lymphoid
Referring to lymphocytes or tissues (e.g., lymph nodes) in which lymphocytes are a major constituent.
Lymphokine
Protein secreted by lymphocytes that affects their own activity and/or that of other cells. Most of the interleukins are lymphokines. Lymphokines represent a subset of cytokines. [examples]
Lymphoma
A cancer characterized by the uncontrolled proliferation of a clone of leukocytes forming solid masses in the body. Compare with Leukemia.
[Burkitt's lymphoma]
Lymphotoxin
Cytokine that triggers apoptosis. Also known as tumor necrosis factor-beta (TNF-β) [More]
Lysergic acid diethylamide (LSD)
Lysine
Lysis
The disintegration of a cell following damage to its plasma membrane. [hemolysis]
Lysogeny
Lysosomes
Lysozyme
[ structure ]
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