MeSH Browser

MeSH Heading: Phytochrome B
Tree Number(s): D12.776.765.675.500; D23.767.712.500
Unique ID: D051939
RDF Unique Identifier: http://id.nlm.nih.gov/mesh/D051939
Scope Note: A plant photo regulatory protein that exists in two forms that are reversibly interconvertible by LIGHT. In response to light it moves to the CELL NUCLEUS and regulates transcription of target genes. Phytochrome B plays an important role in shade avoidance and mediates plant de-etiolation in red light.
Entry Term(s): PhyB Phytochrome; Phytochrome B Protein
Registry Numbers: 136250-22-1
Public MeSH Note: 2006; PHYTOCHROME B was indexed under PHOTORECEPTORS & PHYTOCHROME & TRANSCRIPTION FACTORS 1991-2005, & under PLANT PROTEINS 1991-2004
History Note: 2006(1991)
Date Established: 2006/01/01
Date of Entry: 2005/06/30
Revision Date: 1955/01/01

Allowable Qualifiers: administration & dosage (AD)

adverse effects (AE)

agonists (AG)

analysis (AN)

antagonists & inhibitors (AI)

biosynthesis (BI)

blood (BL)

cerebrospinal fluid (CF)

chemical synthesis (CS)

chemistry (CH)

classification (CL)

deficiency (DF)

drug effects (DE)

economics (EC)

genetics (GE)

history (HI)

immunology (IM)

isolation & purification (IP)

metabolism (ME)

pharmacokinetics (PK)

pharmacology (PD)

physiology (PH)

poisoning (PO)

radiation effects (RE)

standards (ST)

supply & distribution (SD)

therapeutic use (TU)

toxicity (TO)

ultrastructure (UL)

urine (UR)

Phytochrome B MeSH Descriptor Data 2025