Vascular bundle
Videos
A vascular bundle is a part of the transport system in vascular plants. The transport itself happens in the stem, which exists in two forms: xylem and phloem. Both these tissues are present in a vascu
Cross section of celery stalk, showing vascular bundles, which includes both phloem and xylem
Detail of vascular bundle: closed, collateral vascular bundles of the stem axis of Zea mays
Vascular bundle in the leaf of Metasequoia glyptostroboides
The vascular bundle of pine leaf showing xylem and phloem
Pyruvate, phosphate dikinase
Videos
Pyruvate, phosphate dikinase, or PPDK is an enzyme in the family of transferases that catalyzes the chemical reaction
Pyruvate phosphate dikinase dimer, Clostridium symbiosum (PDB: 1KC7)
PPDK is inactivated when PPDK Regulatory Protein (PDRP) phosphorylates Thr456. PDRP both activates and inactivates PPDK.