Catalysis of an oxidation-reduction (redox) reaction in which a diphenol, or related compound, acts as a hydrogen or electron donor and reduces a cytochrome.

Catalysis of the reaction: protoporphyrinogen-IX + O2 = protoporphyrin-IX + H2O2.

oxidoreductase activity, acting on peroxide as acceptor

Catalysis of an oxidation-reduction (redox) reaction in which the peroxide group acts as a hydrogen or electron acceptor.

RNA splicing, via endonucleolytic cleavage and ligation

Splicing of RNA via recognition of the folded RNA structure that brings the 5' and 3' splice sites into proximity and cleavage of the RNA at both the 3' and 5' splice sites by an endonucleolytic mechanism, followed by ligation of the exons.

The process of assisting in the covalent and noncovalent assembly of single chain polypeptides or multisubunit complexes into the correct tertiary structure.

Combining with stem cell factor, a cytokine that stimulates mast cell growth and differentiation, to initiate a change in cell activity.

The joining together of exons from one or more primary transcripts of nuclear messenger RNA (mRNA) and the excision of intron sequences, via a spliceosomal mechanism, so that mRNA consisting only of the joined exons is produced.

Any process that modulates the frequency, rate or extent of DNA binding, selective interaction with deoxyribonucleic acid.

Enables the directed movement of a purine nucleoside, a purine base covalently bonded to a ribose or deoxyribose sugar, into, out of, within or between cells.

vascular endothelial growth factor receptor activity

Combining with vascular endothelial growth factor to initiate a change in cell activity.

Catalysis of the reaction: ATP + a protein tyrosine = ADP + protein tyrosine phosphate.

transmembrane receptor protein tyrosine kinase activity

transforming growth factor beta receptor activity

Combining with transforming growth factor beta to initiate a change in cell activity.

non-membrane spanning protein tyrosine kinase activity

type I transforming growth factor beta receptor activity