Molecules

Articles

• methionine
  15 October 2003

  Definition: Methionine (abbreviated as Met or M) is an essential α-amino acid with the chemical formula HO2CCH(NH2)CH2CH2SCH3. This essential amino acid is classified as nonpolar. Together with cysteine, methionine is one of two sulfur-containing proteinogenic amino acids.
  Biosynthesis
  As an essential amino acid, methionine is not synthesized in humans, hence we must ingest methionine or methionine-containing proteins.
  In plants and microorganisms, methionine is synthesized via a pathway (...)

• heme
  6 October 2003

  A heme (or haem) is a prosthetic group that consists of an iron atom contained in the center of a large heterocyclic organic ring called a porphyrin.
  Not all porphyrins contain iron, but a substantial fraction of porphyrin-containing metalloproteins have heme as their prosthetic subunit; these are known as hemoproteins.
  Structure
  Function
  Members
  heme A
  Heme synthesis (porphyrin synthesis)
  The enzymatic process that produces heme is properly called porphyrin synthesis, as all the (...)

• thymine
  17 October 2005

  Definition: Thymine is a pyrimidine base (nitrogenous base) and constituent of nucleotides and as such one member of the base pair A-T (adenine-thymine) in DNA.
  Thymine, also known as 5-methyluracil, is a pyrimidine nucleobase. It is found in the nucleic acid DNA. In RNA thymine is replaced with uracil in most cases. In DNA, thymine(T) binds to adenine (A) via two hydrogen bonds to assist in stabilizing the nucleic acid structures.
  Thymine combined with deoxyribose creates the nucleoside (...)

• SFTPC
  11 February 2004

  SP-C, surfactant protein C

• retinol
  31 January 2005

  vitamin A

• cAMP
  1 December 2003

  Function
  Hormonal stimulation of cyclic adenosine monophosphate (cAMP) and the cAMP-dependent protein kinase PKA regulates cell growth by multiple mechanisms.
  A hallmark of cAMP is its ability to stimulate cell growth in many cell types while inhibiting cell growth in others.
  See also
  cAMP-dependent PKA pathway
  cell type-specific effects of cAMP on the mitogen-activated protein (MAPs) kinase (extracellular signal-regulated kinase, or ERK) cascade and cell proliferation
  activation (...)

• genome plasticity
  29 September 2003

  Features
  retrotransposition of L1 LINEs (long interspersed elements)

• MLANA
  13 November 2003

  Melanosome-associated protein; MART-1, melan-A, melanoma antigen recognized by T cells 1; MART1
  Immunochemistry
  A103 is a melanocyte-associated monoclonal antibody that recognizes the Melan-A/MART-1 antigen in melanomas.
  Expression in tumors
  melanoma
  sex cord stromal tumors of the ovary (SCSTs) (#12966351#)
  adrenal cortical tumors (#12808065#) adrenal cortical carcinoma
  angiomyolipoma
  References
  Yan S, Brennick JB. False-positive Rate of the Immunoperoxidase Stains for (...)

• adenine
  17 October 2005

  Definition: Adenin is a purine base (nitrogenous base) and constituent of nucleotides and as such one member of the base pair A-T (adenine-thymine) in DNA and A-U (adenine-uracil) in RNA.
  See also
  bases adenine (A) guanine (G) cytosine (C) thymine (T)
  base pairs
  nucleotide

• hydrogen peroxide
  6 January 2008

  H2O2

0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90