melittin
Protein in bee venom responsiblefor causing cell lysis after injection
of bee-sting.
bee
premelittin
Precursor to melittin. Premelittin has 22 additional amino acids at
its N terminus which are later removed to release active venom
protein.
bee
nitrogenase
An enzyme involved in the fixation of nitrogen which occurs in
bacteria.
bacteria
actin
Protein found in muscles. A contractile protein. Structure like a
bead.
vertebrates
myosin
Protein found in muscles. A contractile protein. Structure like a
thick filament.
vertebrates
hemoglobin
Protein containing heme group required for transportation of oxygen
through blood stream
vertebrates
myoglobin
Protein containing heme group required for storage of oxygen in
muscle
vertebrates
keratin
A tough, water-insoluble protein used to make skin, hair, and
nails
mammals
melanin
A brownish-black pigment that aids in protecting the body against
ultraviolet radiation
mammals
collagen
Protein used to make ligaments and bones
mammals
cyclin
A regulatory protein whose abundance varies during the cell cycle and
which regulates biochemical events in a cell cycle-specific manner.
eukaryotes and prokaryotes
endonuclease
An enzyme that breaks phosphodiester bonds within a nucleic acid
molecule
eukaryotes and prokaryotes
exportin
A protein involved in transport of molecules out of the
nucleus.
eukaryotes and prokaryotes
helicase
An enzyme that breaks base pairs in a double-stranded DNA
molecule.
eukaryotes and prokaryotes
phosphofructokinase
A key regulatory enzyme in glycolysis. The enzyme catalyzes one of the
early steps in this pathway.
eukaryotes and prokaryotes
calmodulin
A ubiquitous calcium-binding protein of 148 amino acid residues that
is involved in a range of calcium-dependent signaling pathways.
eukaryotes and prokaryotes
gamma crystallins
Monomeric proteins with a polypeptide chain of around 170 amino acid
residues. Found in cells of the lens.
eukaryotes
retinol-binding protein
Protein responsible for transporting the lipid alcohol Vitamin A
(retinol) from its storage site in the liver to the various
vitamin-A-dependent tissues.
eukaryotes