Tag Archive for 'Protofeather'

Cooper & Milinkovitch demonstrate that an intravenous injection of sonidegib, a potent Shh pathway inhibitor, at embryonic day 9 (E9) temporarily produces striped domains (instead of spots) of Shh expression in the skin, arrests morphogenesis, and results in unbranched and non-invaginated feather buds -- akin to proto-feathers -- in embryos until E14. Image credit: Fabrice Berger & Michel Milinkovitch.

‘Sonic Hedgehog Pathway’ Underlies Evolutionary Emergence and Diversity of Feathers, Study Suggests

Mar 20, 2025 by News Staff

Molecular signaling pathways are communication systems that transmit messages within and between cells. According to a new study by University of Geneva...

An artist’s impression of a bald pterosaur and a feathered pterosaur. Image credit: Megan Jacobs, University of Portsmouth.

New Research Refutes Claims that Pterosaurs Had Protofeathers

Sep 29, 2020 by News Staff

Dr. David Unwin from the University of Leicester and University of Portsmouth’s Professor Dave Martill believe Mesozoic flying reptiles called pterosaurs...