In the mouse it has been demonstarated that ZP3, one of the proteins that make up the zona pellucida, binds to a partner molecule ( to the β1, 4-galactosyl transferase receptors ) on the sperm.

In the mouse ( the best characterised mammalian system ) the zona glycoprotein, ZP3, is responsible for sperm binding, adhering to proteins on the sperm plasma membrane ( GalT ).

Product commercially known as SpayVac, a single injection causes a treated female mammal to produce antibodies that bind to ZP3 on the surface of her ovum, blocking sperm from fertilizing it for periods from 22 months up to 7 years ( depending on the animal ).

Sperm activation has been shown to be caused by calcium ionophores in vitro, progesterone released by nearby cumulus cells and binding to ZP3 of the zona pellucida.

Sperm activation has been shown to be caused by calcium ionophores in vitro, progesterone released by nearby cumulus cells and binding to ZP3 of the zona pellucida.

ZP3 is then involved in the induction of the acrosome reaction, whereby a spermatozoon releases the contents of the acrosomal vesicle.

* ZP3 allows species-specific sperm binding

ZP1, ZP3 and ZP4 bind to capacitated spermatozoa and induce the acrosome reaction.

* ZP1 cross-links ZP2 and ZP3.

* Ada regulon, one of the Escherichia coli adaptive response proteins

Antibodies are an example of proteins that attach to one specific type of molecule.

Not all proteins have more than one subunit.

Regulation is the complex orchestration of events starting with an extracellular signal such as a hormone and leading to an increase or decrease in the activity of one or more proteins.

This is DNA which contains units named genes that can produce proteins through a code ( genetic code ) in which a series of triplets ( codons ) of four possible nucleotides are translated into one of twenty possible amino acids.

At one extreme, anthropologist Marvin Harris, author of Cannibals and Kings, has suggested that the flesh of the victims was a part of an aristocratic diet as a reward, since the Aztec diet was lacking in proteins.

The capsid faces may consist of one or more proteins.

Along with RNA and proteins, DNA is one of the three major macromolecules that are essential for all known forms of life.

On one hand they act as immunodepressors, and protect the embryo from the immune system of the mother and on the other hand viral fusion proteins cause the formation of the placental syncytium in order to limit the exchange of migratory cells between the developing embryo and the body of the mother, where an epithelium won't do because certain blood cells are specialized to be able to insert themselves between adjacent epithelial cells.

The fusion proteins was a way to spread the infection to other cells by simply merging them with the infected one ( similar to HIV ).

This area of the Golgi is the point at which proteins are sorted and shipped to their intended destinations by their placement into one of at least three different types of vesicles, depending upon the molecular marker they carry

These G proteins are made from three subunits, with the G domain located on the largest one ( the α unit ); together with the two smaller subunits ( β and γ units ), they form a tightly associated protein complex.

In the stress response, serum amyloid A, which is one of the acute-phase proteins and an apolipoprotein, is under the stimulation of cytokines ( IL-1, IL-6 ), and cortisol produced in the adrenal cortex and carried to the damaged tissue incorporated into HDL particles.

Two models explain their synthesis: 1 ) a ‘ 2 component model ' where modification occurs at two transmembrane proteins, and 2 ) a ' 1 component model ' where modification occurs only at one transmembrane protein.

As an example, one may consider proteases ( enzymes that aid digestion by causing hydrolysis of peptide bonds in proteins ).

Compounds that bind to isolated recombinant proteins are one thing ; chemical tools that can perturb cell function another ; and pharmacological agents that can be tolerated by a live organism and perturb its systems are yet another.

Behe asserts that the absence of any one of these proteins causes the flagella to fail to function, and that the flagellum " engine " is irreducibly complex as if we try to reduce its complexity by positing an earlier and simpler stage of its evolutionary development, we get an organism which functions improperly.

They extracted one of these glands from the head of a terminally ill specimen in the Singapore Zoological Gardens, and found that it secreted a venom containing several different toxic proteins.

The production and transport of lysosomal proteins suggest one method of lysosome sustainment.

# The new intact transcript has one copy of both xis and int, so approximately equal concentrations of xis and int proteins are produced.

For example, one strategy often in use is the artificial production of proteins, based on the genetic code ( DNA ).

The term " monomeric protein " may also be used to describe one of the proteins making up a multiprotein complex.

Coding regions are composed of codons, which are decoded and translated ( in eukaryotes usually into one and in prokaryotes usually into several ) into proteins by the ribosome.

Along with RNA and proteins, DNA is one of the three major macromolecules that are essential for all known forms of life.

Further, the set of solved structures is biased toward proteins that can be easily subjected to the conditions required in X-ray crystallography, one of the major structure determination methods.

Some gracefully soared from the backs of their wounded, screaming mounts to make one last defiant charge before the lead split their hearts or tore their guts.

But even a reunion as joyous as this one did not make a break in the routines of the day.

I clapped the big man with the bleached hair on his shoulder and said heartily, hoping it would make an impression on the women: `` This one is the maku Frayne.

`` Can I make you one ''??

The stink is all the same to me, but I really think they can make one another out blindfolded ''.

All expressed interest in world affairs but no one offered to make any sacrifices to satisfy this interest.

At one time she felt impelled to make dances that `` moved all over the stage '', much as Pollock's paintings move violently over the full extent of the canvas.

Yet often fear persists because, even with the most rigid ritual, one is never quite free from the uneasy feeling that one might make some mistake or that in every previous execution one had been unaware of the really decisive act.

For the occasion on which everyone already knows everyone else and the host wishes them to meet one or a few honored newcomers, then the `` open house '' system is advantageous because the honored guests are fixed connective points and the drifting guests make and break connections at the door.

Debate is not likely to resolve the tensions and make the lot of the stepchild a happier one.

`` Volstead laws, speed laws, divorce laws '', he said, `` as they now stand, demoralize the individual, make liars and law breakers of us in one way or another, and tend to make our experiment in democracy absurd.

If within one year you can make a success out of the American, you can practically name your own salary thereafter.

For a freshman Congressman to read political Lessons to graybeard Democrats was poor policy for one who needed to make friends.

As I have said, words from Tennyson remain ever in my memory: `` That mind and soul, according well, May make one music as before ''.

These lines never cease to haunt the book amidst all the exaltations of combat, and to make an appeal for a larger and more elemental human community than one based on the brutal necessities of war.

I hate embarrassing silences and have been known to make a fool out of myself just to prevent one.

DeKalb's budget for 1961 is a record one and carries with it the promise of no tax increase to make it balance.

The new City Charter, which should get a Yes vote as Question No. 1 on Nov. 7, would not make a good Mayor out of a bad one.

There are a number of other considerations besides this one but it is for the Congress, not the Department of Justice, to balance these various considerations and make a judgment about legislation.

What was missing in the Governor's argument, as in so many similar arguments, was a premise which would enable one to make the ethical leap from what might be militarily desirable to what is right.

Besides the lack of an adequate ethical dimension to the Governor's case, one can ask seriously whether our lead over the Russians in quality and quantity of nuclear weapons is so slight as to make the tests absolutely necessary.

These little songs, however, were sweet nothings from the heart, tender memories of his childhood, little melodies that anyone could hum and that would make one want to weep.