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Merck
CN

M8009

Tyr-[Trp2]-Melanocyte Stimulating Hormone Release Inhibiting Factor trifluoroacetate salt

≥97% (HPLC)

Synonym(s):

[Tyr0, Trp2]-MIF-I, Tyr-W-MIF-I

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About This Item

Empirical Formula (Hill Notation):
C27H32N6O5
CAS Number:
Molecular Weight:
520.58
UNSPSC Code:
12352200
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assay

≥97% (HPLC)

storage temp.

−20°C

Biochem/physiol Actions

Mixed agonist/antagonist at opiate receptors

Other Notes

Originally isolated from human frontal cortex and from bovine hypothalamus

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Regulatory Information

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K A Gergen et al.
Peptides, 15(8), 1505-1511 (1994-01-01)
Tyr-W-MIF-1 is a tetrapeptide recently isolated from brain that has opiate modulating activity. In this study, we used immunocytochemical (ICC) detection of FOS proto-oncogene protein to map brain areas activated by an ICV injection of Tyr-W-MIF-1 (200 micrograms). The analgesic
J E Zadina et al.
Neuroscience letters, 155(2), 220-222 (1993-06-11)
A peptide recently isolated from human and bovine brain, Tyr-W-MIF-1 (Tyr-Pro-Trp-Gly-NH2), was tested for its effects on nociception in the tail-flick test after intracerebroventricular injection in the rat. Tail-flick latencies were significantly increased with a rapid onset and remained significantly
W A Banks et al.
Journal of neuroscience research, 35(6), 690-695 (1993-08-15)
Tyr-W-MIF-1 (Tyr-Pro-Trp-Gly-NH2) is a recently isolated peptide that belongs to a larger family that includes Tyr-MIF-1 (Tyr-Pro-Leu-Gly-NH2) and MIF-1 (Pro-Leu-Gly-NH2). Despite similarities in structure, Tyr-MIF-1 and MIF-1 can act differently in behavioral, blood-brain barrier (BBB) transport, and receptor binding systems.
J Erchegyi et al.
Peptide research, 6(1), 31-38 (1993-01-01)
Analogs of the naturally occurring peptides Tyr-MIF-1 (Tyr-Pro-Leu-Gly-NH2) and Tyr-W-MIF-1 (Tyr-Pro-Trp-GLy-NH2) were synthesized and investigated for their opiate agonist as well as antagonist activity in the guinea pig ileum assay. [Tyr5]-Tyr-MIF-1 and the endogenous Tyr-W-MIF-1 were the most potent opiate
J E Zadina et al.
Nature, 386(6624), 499-502 (1997-04-03)
Peptides have been identified in mammalian brain that are considered to be endogenous agonists for the delta (enkephalins) and kappa (dynorphins) opiate receptors, but none has been found to have any preference for the mu receptor. Because morphine and other

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