HOMEWORK HELP PLEASE!! what is hormone-receptor binding? And I need an example!?
597037
I dont know if this is it, but go here at: http://www.ks.uiuc.edu/Research/pro_DNA/ster_horm_rec/
750183
Hormones... just hormones. Female sex hormones tend to lower your basal metabolic rate (BMR). BMR determines the rate at which you burn calories and produce heat. With a low BMR (as with excess female sex hormones) means less calories being burnt and more weight gain as fat. Thyroid hormones also play a vital role. Testosterone which is the male sex hormone, raises BMR. That is why men are bit more physically active than women, because they have more testosterone. Both sexes have both hormones but not in equal amounts. Of course there are aberrants.
908331
OH MY! I'm sorry, but this news story has everything BACKWARDS!!!\n\nEstrogen is the hormone that stimulates cell growth, NOT progesterone. Progesterone causes cells to mature and die off.\nI think that the writer may have confused progesterone, the bioidentical hormone, with progestin - the synthetic hormone that DOES cause cancers.\n\n- HRT (estrogen supplement) is the cause of many breast cancers.\n- Progesterone is known to PROTECT women from female cancers.\n\nThis article is NUTS!!
781987
Affinity chromotography is a powerful and generally applicable means of purifying proteins. It takes advantage of the high affinity of many proteins for specific chemical groups.\n\nThats the textbook definition\nEssentially, it's a way of purifying proteins or transcription factors (aka hGH) from a mixture by filling up a column up with a specific chemical group that will exclusively bind to the target protein or TF. As the mixture is moved down the column, it is known as the mobile phase because it's moving. The stationary phase is the packing of the column (or in this case the specific chemical group that will interact with the mixture).\n\nSo how does it purify the target compound?\n\nAs the mobile phase flows down the column, the target molecule binds to specific receptors of the stationary phase while the rest of the impurities flow through the column. Realize that the receptor site is only a small part of the chemical group of the stationary phase and is the only part of the phase that binds to the target molecule. After all the impurities of the mixture has flowed through the column, the target molecule can be released by adding a concentrated solution of the receptor for the target molecule. The high concentration of the receptor solution causes the target molecule to release from the stationary phase receptor and bind to the mobile phase receptor. The compound is thus eluted in this concentrated mobile phase and has been purified.\n\nhGH binds with hGHR (human growth hormone receptor) so in order to purify an impure mixture of hGH, a chemical group containing a site with hGHR should be selected as the stationary phase. Run the mixture through and elute out the impurities (hGH binds to hGHR on stationary phase). Add concentrated hGHR into the column and elute out the purified hGH (hGH is released from hGHR of stationary phase and binds to hGHR of mobile phase).\n\nHopefully this helps
645855
STH\nsomatotropic hormone\n\nGrowth hormone\nGrowth hormone is a polypeptide hormone synthesised and secreted by the anterior pituitary gland which stimulates growth and cell reproduction in humans and other vertebrate animals.\nThis article describes human growth hormone physiology, with brief mentions of the diseases of GH deficiency, GH excess (acromegaly and pituitary gigantism), as well as GH treatment, and HGH quackery. Each of these topics is treated more fully in separate articles.\n\n----------------------------------------------------------\n\nSth\n■  abbreviation south. \n\n----------------------------------------------------------
884280
It is probably hormonal ! !
197575
Endocrine refers to all hormones, not just those of the pancreas.  They are made in one cell and released into the blood stream where they work on distant cells.\n\nNeurological transmissions are predominately electrical.  The neuron gets depolarized and sends an electric signal down its axon (long process of the cell) to where it will be going to  (a muscle for example).  When the electric signal reaches its destination (the end of the axon) it causes a release of a neurotransmitter from the axon (each axon only releases one type of neurotransmitter).  These transmitters diffuse to where they are going (a muscle for example) and cause a change in that cell.\n\nSome similarities are that both hormones and neurotransmitters have specific receptors for them and they both cause changes in the cells that they interact with.  Also, there are some neurotransmitters that are hormones, they are released from the end of the axon into the bloodstream and then go to distant cells to do their work.
661752
Oral HGH does not, will not, and cannot work.  If it is a real hormone, it must be injected.  Your stomach is full of acid.  What happens to hormones in acid? They are "digested", ie they are dismantled by the acid into simpler form for absorption into the body.  Whatever action they may have had as hormones is negated.
275981
In the molecular world of life, hormone is a molecule that 'signals wide-spread effects' while an enzyme 'enables local effects'.\n\nHORMONE IS A MESSENGER: It is a protein or other type (e.g., steroids) of molecule. It is released from one cell in the body, travels in the blood (in animals), reaches some other cell that 'responds'. In this target cell, there are 'specific receptors' that interact with this messenger-molecule and the cell 'responds'. For example, the skin cells in the face of a male teenager respond (grow hair) to several molecules of testosterone, a steroid hormone,  that are produced in testes. The entire process of response requires (a) availability of specific hormone, (b)its specific receptor as well as (c) the downstream series of reactions in the target cell. Different types of hormones cause different responses. \n\nENZYME IS A CATALYST: These molecules also act on very specific molecules (called substrates in this case) to produce an effect. The effects can be breaking a molecule, joining two molecules, modifying part of a molecule etc. In fact, these effects may never happen without an enzyme. However, the enzyme itself is largely unaffected and can be recycled. Mostly, enzymes are proteins and are not secreted through blood.
13540
Both steroid and thyroid hormone families of receptors can be used to regulate protein functions.
485673
Hormones and stress:http://salmon.psy.plym.ac.uk/year1/stressho.htm\n\nhttp://salmon.psy.plym.ac.uk/year1/stressho.htm#stressors_hormone_levels
743913
Receptor sites, weather or not the hormone is steroidal or non-steroidal, type of tissue targeted.
425801
http://arbl.cvmbs.colostate.edu/hbooks/pathphys/endocrine/hypopit/overview.html\n\nhttp://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Pituitary.html\n\nThose two sites have examples.
1109630
Hormones are a sensitive issue , everyone makes them at different levels , and we all react to them differently. It's what is in your own body chemistry that counts...your genes I mean.\nYou give 10 people the same doses of the same hormones and you can come back with 10 different reactions.\nI say why waste your time worrying about something in witch you can't nor would take back ...you've two beautiful children from it , enjoy life seems to fly by . One day your slipping on your slippers to get out of bed to start breakfast & the house is empty.\nBelive me I know , Enjoy your babies , soon they'll have their own.I've 6 grand-children and love'em all of them to piece's ~
392145
These are Nurse cells, produce Estradiol (E2) but the action of aromatase on testesterone. produce Androgen binding protein correctly called Sex Hormone Binding Globulin, responds to FSH but not LH. They sequester testosterone produced in the Leydig cells and thus promote spermatogenesis\n\nThe are capable to making DHT (Dihydroxy Testosterone) the potent form by the enzyme called 5alpha reductase
641843
steroid hormone receptor.  or any receptor that is inside the cell in the cytoplasm, and not imbedded in the cell membrane.\n\nthese receptors influence gene transcription and protein translation.  these effects can last days to weeks to years.  cell-membrane receptors usually have short lived effects like phosphorylation of proteins that will only last for seconds or minutes.
521989
Most obvious difference: peptide hormones usually act extracellularly while steroid hormones usually act intracellularly.\n\nPeptide hormones can't usually cross the cell membrane, so they exert their effects by binding to a cell-surface receptor.  The receptor then has to transmit the signal into the cell through some sort of second messenger system.\n\nSteroid hormones are fat soluble, so they can pass right through the cell membrane.  As a result they usually interact with soluble receptors floating around *inside* the cell.  In many cases, the hormone-receptor complex will act directly on the DNA, to regulate gene transcription--no second messenger required.