Date published: 2026-4-2

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MYH2 Inhibitors

The class of MYH2 inhibitors encompasses a diverse array of chemicals designed to modulate the activity of myosin II, specifically targeting the MYH2 isoform. These inhibitors act through various mechanisms, interfering with key regulatory proteins and pathways involved in the dynamic interplay between actin and myosin II. Blebbistatin and its derivatives directly bind to the myosin ATPase domain, preventing proper actin-myosin interactions and thereby inhibiting MYH2-mediated cellular processes, making them valuable tools for understanding cellular mechanics and interventions. ML-7 and Y-27632 act indirectly by targeting upstream regulators of MYH2, specifically myosin light chain kinase (MLCK) and Rho-associated protein kinase (ROCK), respectively. By modulating the phosphorylation status of the myosin regulatory light chain, these inhibitors influence MYH2 function, shedding light on the intricate signaling pathways governing myosin II activity. Inhibitors like CK-666, CK-869, and CK-548 interfere with actin dynamics by targeting the Arp2/3 complex and formin proteins, crucial players in actin polymerization. These compounds indirectly impact MYH2 function by disrupting the formation of actin filaments, providing insights into the regulatory mechanisms governing MYH2 activity in the context of cellular motility and cytoskeletal dynamics. Furthermore, SMIFH2 and its hydrochloride salt formulation, along with H-1152, add to the diversity of MYH2 inhibitors by targeting formin and ROCK, respectively.

Items 1 to 10 of 11 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

(S)-(−)-Blebbistatin

856925-71-8sc-204253
sc-204253A
sc-204253B
sc-204253C
1 mg
5 mg
10 mg
25 mg
$72.00
$265.00
$495.00
$968.00
(2)

(S)-(-)-Blebbistatin is a selective inhibitor of non-muscle myosin II, characterized by its unique ability to disrupt myosin-actin interactions. This compound exhibits distinct binding dynamics, favoring the inactive state of myosin, which alters the kinetics of muscle contraction and cellular motility. Its stereochemistry plays a crucial role in modulating the conformational changes necessary for myosin function, thereby influencing cellular processes and mechanical properties at the molecular level.

ML-7 hydrochloride

110448-33-4sc-200557
sc-200557A
10 mg
50 mg
$91.00
$267.00
13
(1)

ML-7 inhibits myosin light chain kinase (MLCK), which plays a role in phosphorylation of myosin light chain, a necessary step for myosin activation.

ML-9

105637-50-1sc-200519
sc-200519A
sc-200519B
sc-200519C
10 mg
50 mg
100 mg
250 mg
$112.00
$449.00
$673.00
$1224.00
2
(1)

Similar to ML-7, ML-9 is an inhibitor of MLCK. By inhibiting MLCK, the phosphorylation of myosin light chain is reduced, leading to decreased myosin activation.

Y-27632, free base

146986-50-7sc-3536
sc-3536A
5 mg
50 mg
$186.00
$707.00
88
(1)

Y-27632 is a Rho-associated protein kinase (ROCK) inhibitor. ROCK is involved in the regulation of myosin light chain phosphorylation, and its inhibition can decrease myosin activity.

SMIFH2

340316-62-3sc-507273
5 mg
$140.00
(0)

SMIFH2 is an inhibitor of formins, proteins involved in actin polymerization. Though it primarily affects actin, the result can indirectly influence the actin-myosin interaction.

H-1152 dihydrochloride

451462-58-1sc-203592
sc-203592A
1 mg
5 mg
$104.00
$364.00
7
(1)

H-1152 is another potent ROCK inhibitor. By inhibiting ROCK, it indirectly impacts the phosphorylation state of myosin light chain and, hence, its activation.

H-89 dihydrochloride

130964-39-5sc-3537
sc-3537A
1 mg
10 mg
$94.00
$186.00
71
(2)

H-89 is an inhibitor of protein kinase A (PKA). PKA can phosphorylate and regulate various proteins involved in the myosin activation pathway.

Gö 6976

136194-77-9sc-221684
500 µg
$227.00
8
(1)

Gö 6976 is a protein kinase C (PKC) inhibitor. PKC plays a role in myosin light chain phosphorylation, and its inhibition can affect myosin activity.

U-0126

109511-58-2sc-222395
sc-222395A
1 mg
5 mg
$64.00
$246.00
136
(2)

U-0126 is an inhibitor of MAPK/ERK kinase. This kinase affects various cellular processes, including those linked to myosin expression and activity.

SP600125

129-56-6sc-200635
sc-200635A
10 mg
50 mg
$40.00
$150.00
257
(3)

SP-600125 is a selective JNK inhibitor. The JNK pathway has links to cellular processes related to muscle contraction and myosin activity.