Property talk:P4269

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half maximal effective concentration (EC50)
concentration of a drug, antibody or toxicant which induces a response halfway between the baseline and maximum after a specified exposure time

Represents	half maximal effective concentration (Q286136)
Data type	Quantity
Domain	chemistry, molecular biology, biology (note: this should be moved to the property statements)
Allowed units	According to this template: mole (Q41509) (or more commonly: nM (1x10^-9 mole), uM (1x10^-6 mole) and mM (1x10^-3 mole)) According to statements in the property: mole (Q41509), mole per litre (Q21064845), mole per cubic metre (Q2415352) or mole per cubic decimetre (Q107970291) When possible, data should only be stored as statements
Example	Ro 40-6055 (Q27088586) → 7.943E−8 mole
Source	PubChem, BindingDB (note: this information should be moved to a property statement; use property source website for the property (P1896))
See also	median lethal concentration (LC50) (P2712), half maximal inhibitory concentration (IC50) (P4268)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Minimum and maximum Items with highest numeric value Items with lowest numeric value Database reports/Constraint violations/P4269 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 3 Main statement 1 33.3% of uses Qualifier 2 66.7% of uses

[create Create a translatable help page (preferably in English) for this property to be included here]

Units: “mole (Q41509), mole per litre (Q21064845), mole per cubic metre (Q2415352), mole per cubic decimetre (Q107970291)”: value unit must be one of listed. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P4269#Units

Scope is as main value (Q54828448), as qualifier (Q54828449): the property must be used by specified way only (Help)

List of violations of this constraint: Database reports/Constraint violations/P4269#Scope, hourly updated report, SPARQL

Citation needed: the property must have at least one reference (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P4269#citation needed

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P4269#Entity types