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morphogen
This term is used exclusively within the specialized register of developmental biology and genetics. It describes a specific type of signaling molecule that does not simply act as an on-off switch, but rather provides positional information to cells based on a concentration gradient.
Because the cellular response varies according to the amount of the molecule present, morphogens are central to the concept of pattern formation in embryos. In a laboratory or academic context, it is often contrasted with general ligands or growth factors that may not form the specific spatial gradients required for complex tissue organization.
Meanings
Examples
The morphogen spreads from the source to create a concentration gradient.
Which morphogen is responsible for patterning the limb bud in this species?
Which morphogen is responsible for patterning the limb bud in this species?
A single morphogen can trigger multiple different cell fates depending on its concentration.
I wonder if this specific morphogen is inhibited by the surrounding extracellular matrix.
I wonder if this specific morphogen is inhibited by the surrounding extracellular matrix.
The distribution of the morphogen determines where the tissue will differentiate.
The distribution of the morphogen determines where the tissue will differentiate.
Look at how the morphogen gradient shifts during the early stages of embryogenesis.
The protein acts as a morphogen to organize the spatial arrangement of cells.
If the morphogen concentration is too low, the cells will not receive the signal to divide.