If you have been reading about Melanocortin receptor and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2026-04-13. Numbers and descriptions here follow the published literature rather than marketing material.
Outside the approved product, bremelanotide circulates as a research chemical sold by peptide vendors, often labelled PT-141. Such material is not manufactured under pharmaceutical quality standards, and independent testing has repeatedly found content that differs from the label. Analytical certificates supplied with a purchase are not strong evidence of purity because they are usually generated by the seller. Online discussion tends to blur the distinction between the approved drug and unregulated powder, which complicates interpretation of reported experiences.
PT-141 is the original development code for bremelanotide, a synthetic peptide first studied as a potential tanning and sexual-response agent in the 1990s. Researchers at a small American biotechnology firm designed it as a shortened analogue of melanotan II, which itself came from work on alpha-melanocyte-stimulating hormone. Early screening focused on pigmentation, but behavioural observations in animal models redirected attention toward sexual motivation. That shift made PT-141 one of the first melanocortin compounds investigated specifically for effects on desire rather than on skin colour.
The molecular backbone consists of seven amino acid residues joined into a ring through a disulfide bridge. This cyclic conformation is critical for receptor binding. The sequence includes an acetylated N-terminus and an amidated C-terminus, modifications that improve resistance to enzymatic breakdown. One residue is in the D-configuration, a feature that further stabilizes the peptide against protease activity. Together, the ring structure and specific stereochemistry determine selectivity among melanocortin receptor subtypes.
Across literature and commercial listings, the substance appears under several names, including bremelanotide, PT-141, and various brand designations. A CAS registry number provides a unique identifier for the compound, aiding retrieval from chemical databases. Synonym lists may also contain early development codes and descriptive chemical names. When consulting sources, researchers need to confirm that the cited names refer to the same molecular structure to avoid confusion. Naming consistency matters especially when comparing analytical data across publications.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C50H68N14O10 | Free base; the drug product is formulated as an acetate salt |
| Molar mass | About 1025 g/mol | Calculated for the free base |
| Appearance | White to off-white lyophilized powder | Typical form of research-grade material |
| CAS Registry Number | 189691-06-3 | Common listing for the free base |
| Typical storage | -20 °C, desiccated, protected from light | Repeated freeze-thaw cycles are best avoided |
Lyophilised peptide is generally held below minus twenty degrees Celsius, protected from light and moisture, because hydrolysis and oxidation accumulate faster at ambient temperature. Once reconstituted, solutions are typically kept between two and eight degrees Celsius and used within a short window defined by the supplier. Repeated freeze-thaw cycles are avoided since they promote aggregation and loss of soluble material. Container material matters as well, because peptides adsorb to certain plastics and glass surfaces at low concentration. Stability figures supplied by a vendor apply only to the specific lot and buffer that were tested.
Identity and purity are usually established with reversed-phase high-performance liquid chromatography combined with mass spectrometry. A gradient of water and acetonitrile containing trifluoroacetic acid is a common mobile phase, and ultraviolet detection near 214 nanometres responds to the peptide backbone. Mass spectrometry confirms the expected molecular mass and helps reveal truncation or oxidation products. Purity is reported as a peak-area percentage, a figure that depends on the wavelength and gradient used, so values from different laboratories are not always directly comparable. Peptide mapping and amino acid analysis provide additional confirmation when required.
Todd's other television appearances include a recurring role on Boston Public and guest appearances on Law & Order, Homicide: Life on the Street, Hercules: The Legendary Journeys, Xena: Warrior Princess as Cecrops, The X-Files, Smallville, Psych, Angel, 24, Charmed, Stargate SG-1, Andromeda, Criminal Minds, 21 Jump Street, and Chuck. Todd is one of the few actors to have portrayed two different speaking roles on 24. He was initially cast as Detective Michael Norris in season three and four years later as General Benjamin Juma in both 24: Redemption and season 7. He also played a major role in the Babylon 5 TV film A Call to Arms. He portrayed several characters in the Star Trek universe: Worf's brother Kurn in Star Trek: The Next Generation and Star Trek: Deep Space Nine, an adult Jake Sisko in the episode "The Visitor" in Star Trek: Deep Space Nine, and an Alpha Hirogen in the episode "Prey" in Star Trek: Voyager. In 2017, Todd returned to the world of Star Trek as General Rodek in the MMORPG game Star Trek Online. Todd also provided the voices of the Decepticon Dreadwing on Transformers: Prime, and Icon in Young Justice. In 2015, Todd was cast as the disguised voice of Zoom (portrayed by Teddy Sears when undisguised) in the second season of The Flash. Todd would later reprise his role in the fifth season episodes "What's Past Is Prologue" and "Godspeed" (though the latter featured archive audio of Todd instead) and returned to the role one last time for the series finale, "A New World, Part Four".
=== Strategies === A long-acting insulin is used to approximate the basal secretion of insulin by the pancreas, which varies in the course of the day. NPH/isophane, lente, ultralente, glargine, and detemir may be used for this purpose. The advantage of NPH is its low cost, the fact that you can mix it with short-acting forms of insulin, thereby minimizing the number of injections that must be administered, and that the activity of NPH will peak 4–6 hours after administration, allowing a bedtime dose to balance the tendency of glucose to rise with the dawn, along with a smaller morning dose to balance the lower afternoon basal need and possibly an afternoon dose to cover evening need. A disadvantage of bedtime NPH is that if not taken late enough (near midnight) to place its peak shortly before dawn, it has the potential of causing hypoglycemia. One theoretical advantage of glargine and detemir is that they only need to be administered once a day, although in practice many people find that neither lasts a full 24 hours. They can be administered at any time during the day as well, provided that they are given at the same time every day. Another advantage of long-acting insulins is that the basal component of an insulin regimen (providing a minimum level of insulin throughout the day) can be decoupled from the prandial or bolus component (providing mealtime coverage via ultra-short-acting insulins), while regimens using NPH and regular insulin have the disadvantage that any dose adjustment affects both basal and prandial coverage.
On 15 August 2008, Permskie Novosti reported that a Russian soldier had called home on 10 August and told his mother: "We are there [in South Ossetia] since 7 August. All of our 58th army." On 15 August 2008, Vyatksky krai reported that the sister of soldier Vitaly (who was fighting in South Ossetia) said that her brother called on 6 August and he was going to move [to unknown location]; later, Vitaly told his sister on 7 August that "we are going to the mountains." On 15 August 2008, Komsomolskaya Pravda reported that 19-year-old Onar Aliev from the 19th Motor Rifle Division died in South Ossetia on the night of 8 August during the shelling of Tskhinvali. His mother said her son called for the last time on 4 August and told her that he would participate in the "true exercises" somewhere near Abkhazia. On 15 August 2008, Trud made a report about junior sergeant Aleksandr Sviridov who was killed in South Ossetia. He called his mother on 2 August and said: "There won't be any holiday. There are intensified preparations; we frequently have parachute jumps. Apparently, we will be deployed to somewhere." On 17 August 2008, Komsomolskaya Pravda reported that Aleksandr Plotnikov, the soldier from 693rd Regiment, said that he knew in early August that there would be war when two companies of his regiment were sent to the mountains near Tskhinvali. In August 2008, Life.ru reported that 29-year Aleksey Tarasov, who was killed in action in South Ossetia, was buried in his village.
== History == In the early 1940s clinicians used extracts of growth factors and cytokines for healing. The term 'platelet-rich plasma' was first used in 1954 by Kingsley and in the 1960s the first PRP blood banks were established, becoming popular by the 1970s. In the 1970s PRP was used in hematology, originally for transfusions to treat thrombocytopenia. Ten years later it was used for maxillofacial surgeries. PRP was first used in Italy in 1987 in an open heart surgery procedure. In 2006 PRP was starting to be considered of potential use for both androgenic alopecia and alopecia areata.
Sources: en.wikipedia.org
==== Polyfloral ==== Polyfloral honey, also known as wildflower honey, is derived from the nectar of many types of flowers. The taste may vary from year to year, and the aroma and the flavor can be more or less intense, depending on which flowers are blooming.
=== CBTL single-serve system === CBTL, a single-serve system for home use, was launched in the United States, Singapore, Malaysia, South Korea, and the Philippines in 2010. Several types of single-serve capsules are available for the machines: espresso, coffee, tea, and hot chocolate.
While praising the quality of its offering, industry commentators attributed Arivale's closure to a failure to capture sufficient Customer lifetime value to create a profit from providing the service, suggesting that insufficient numbers of customers stuck with the data-driven, personalized dietary and lifestyle coaching it provided for long enough at a price point which would make the business model work.
Sources: en.wikipedia.org
Scarification involves scratching, etching, burning/branding, or superficially cutting designs, pictures, or words into the skin as a permanent body modification or body art. The body modification can take roughly 6–12 months to heal. In the process of body scarification, scars are purposely formed by cutting or branding the skin by various methods (sometimes using further sequential aggravating wound-healing methods at timed intervals, like irritation). Scarification is sometimes called cicatrization.
=== First Supply Chain Management Certification === The term Supply Chain Management (SCM) was coined in the early eighties (1982) by Booz Allen Consultant, Keith Oliver, but remained only a buzzword for many years. The holistic concept of a cross-functional set of processes aimed to fulfill the customer's needs, started to make sense to companies, consultants and academics in the early nineties. It was until the decade's end, when technology enabled Business Process Integration throughout each company and extended to other companies, that the term SCM was widely adopted. SCM finally grew to become normal science in the first decade of the millennium. ISCEA's founding members identified the need of a professional SCM certification organization and developed the Certified Supply Chain Manager (CSCM) certification program. It was the first certification program developed by ISCEA and was launched simultaneously with ISCEA's initial website in early 2003. There are other professional knowledge certifying bodies currently offering SCM certification. Some of them founded many years before ISCEA. But their SCM certification programs were released after ISCEA's CSCM:
== Patient-centric initiatives == In September 2016, Dr. Reddy's launched “Purple Health” in India, a patient centric platform to deliver solutions that address unmet needs of patients. Purple Health will address unmet needs of patients involving four segments: awareness, access (access to medication), adherence (adherence to therapy) and experience (simplified medication experience). The first step in this program will be the launch of new patient friendly packaging for its top 25 best-selling brands, which will be rolled-out in a phased manner over the next six months. The packaging has been designed such that blister packs would have extra space for brand name which ensures easy identification at the pharmacy, a tab at the bottom with expiry date clearly mentioned, and a pictorial representation of the time the medicine needs to be taken. In case of bottles, the measuring cup is now easy to read, and neck of the bottle has been modified to ensure minimal spillage. Purple Health also includes patient support services. For example, someone taking medicines for an advanced kidney condition would be supported by messages and counselling on diet, medicine and so on.
== Fragrance == Sandalwood oil is used extensively for its woody-floral scent. Sandalwood oil can also, under certain conditions, have a creamy or even pickled aroma. It pairs well with other wood or floral scents such as violet, rose, tuberose, clove, and oakmoss. But since the wood is so rare and expensive, cosmetic companies use synthetic substitutes of similar structure and scent. There are several synthetic odorants with odor similar to sandalwood oil, used as lower-cost alternatives for perfumes, emollients, and skin cleaning agents. Common synthetic substitutes include Bacdanlol, Brahmanol, Ebanol, Firsantol, Sandalore, and Sandaxol. Two of these, Sandalore and Brahmanol, have been found to be agonists of the cutaneous olfactory receptor OR2AT4, with potential therapeutic benefits for wound healing. Natural sandalwood oil, and other synthetic sandalwood odorants, did not have the same effect.
Sources: en.wikipedia.org
PT-141 is a research code for bremelanotide, a cyclic peptide that activates melanocortin receptors. It was developed for sexual dysfunction and later approved under a brand name as a subcutaneous injection. The same code is widely used by suppliers selling non-pharmaceutical material.
Both are synthetic melanocortin agonists and share a similar peptide backbone, but they are distinct molecules with different receptor profiles. Melanotan II was never approved as a medicine, whereas bremelanotide was. Findings about one compound should not be transferred to the other without direct evidence.
It is typically distributed as a lyophilized powder in sealed vials, sometimes with a separate solvent. Purity statements usually originate from the supplier rather than an independent laboratory. Storage recommendations vary between vendors, which makes comparison across sources difficult.
It belongs to the melanocortin receptor agonist family of peptides. Its cyclic structure distinguishes it from linear peptides and shapes its receptor binding profile.