Date published: 2026-1-11

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CYBASC3 Activators

Cytochrome b561 family member A3 (CYB561A3), also known as duodenal cytochrome b (Dcytb), is a transmembrane protein that belongs to the cytochrome b561 family of proteins. These proteins are characterized by their heme-binding domains and their role in electron transfer across cellular membranes. CYB561A3 is specifically known for its function in the reduction of ferric to ferrous iron at the brush border of the duodenum, which is an essential step in dietary iron absorption.

CYB561A3 utilizes ascorbate (vitamin C) as an electron donor to reduce iron, which is then transported into the cell by divalent metal transporter 1 (DMT1). This process is vital for maintaining iron homeostasis in the body and blcoking conditions such as anemia. The protein is expressed on the apical surface of enterocytes in the duodenum, which is the primary site for iron absorption.The activity of CYB561A3 is tightly regulated by the body's iron needs, with expression levels responding to iron stores and demand. When iron levels are low, the body upregulates proteins like CYB561A3 to increase iron absorption. Conversely, when iron is abundant, the expression of CYB561A3 is reduced to blocking excess iron accumulation, which can be toxic.

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Items 1 to 10 of 12 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

L-Ascorbic acid, free acid

50-81-7sc-202686
100 g
$46.00
5
(1)

May upregulate CYB561A3 to enhance electron transfer for ascorbate regeneration.

(+)-α-Tocopherol

59-02-9sc-214454
sc-214454A
sc-214454B
10 g
25 g
100 g
$43.00
$62.00
$141.00
(1)

As an antioxidant, it might increase the need for CYB561A3 in combating oxidative stress.

Glutathione, reduced

70-18-8sc-29094
sc-29094A
10 g
1 kg
$82.00
$2091.00
8
(2)

Could upregulate CYB561A3 to maintain redox homeostasis.

N-Acetyl-L-cysteine

616-91-1sc-202232
sc-202232A
sc-202232C
sc-202232B
5 g
25 g
1 kg
100 g
$34.00
$74.00
$270.00
$114.00
34
(1)

May induce CYB561A3 expression by acting as a precursor to glutathione.

D,L-Sulforaphane

4478-93-7sc-207495A
sc-207495B
sc-207495C
sc-207495
sc-207495E
sc-207495D
5 mg
10 mg
25 mg
1 g
10 g
250 mg
$153.00
$292.00
$489.00
$1325.00
$8465.00
$933.00
22
(1)

Might enhance CYB561A3 expression due to its role in oxidative stress response.

Curcumin

458-37-7sc-200509
sc-200509A
sc-200509B
sc-200509C
sc-200509D
sc-200509F
sc-200509E
1 g
5 g
25 g
100 g
250 g
1 kg
2.5 kg
$37.00
$69.00
$109.00
$218.00
$239.00
$879.00
$1968.00
47
(1)

Could upregulate CYB561A3 through its antioxidant properties.

Resveratrol

501-36-0sc-200808
sc-200808A
sc-200808B
100 mg
500 mg
5 g
$80.00
$220.00
$460.00
64
(2)

May induce CYB561A3 as part of a cellular protective response against oxidative damage.

Quercetin

117-39-5sc-206089
sc-206089A
sc-206089E
sc-206089C
sc-206089D
sc-206089B
100 mg
500 mg
100 g
250 g
1 kg
25 g
$11.00
$17.00
$110.00
$250.00
$936.00
$50.00
33
(2)

Could stimulate CYB561A3 expression due to its role in modulating oxidative stress.

(−)-Epigallocatechin Gallate

989-51-5sc-200802
sc-200802A
sc-200802B
sc-200802C
sc-200802D
sc-200802E
10 mg
50 mg
100 mg
500 mg
1 g
10 g
$43.00
$73.00
$126.00
$243.00
$530.00
$1259.00
11
(1)

Might upregulate CYB561A3 as it is involved in cellular antioxidant defense mechanisms.

Ferulic acid

1135-24-6sc-204753
sc-204753A
sc-204753B
sc-204753C
sc-204753D
5 g
25 g
100 g
500 g
1 kg
$43.00
$63.00
$156.00
$563.00
$1008.00
10
(3)

May induce CYB561A3 expression by enhancing antioxidant activity.