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Plastoquinone (PQ) is a terpenoid-quinone (meroterpenoid) molecule involved in the electron transport chain in the light-dependent reactions of photosynthesis. The most common form of plastoquinone, known as PQ-A or PQ-9, is a 2,3-dimethyl-1,4-benzoquinone molecule with a side chain of nine isoprenyl units.
Around 550 cases of primary bone cancer – a cancer that begins in the bones – are diagnosed in the UK each year
A bone tumor is an abnormal growth of tissue in bone, traditionally classified as noncancerous (benign) or cancerous (malignant). [1] [4] Cancerous bone tumors usually originate from a cancer in another part of the body such as from lung, breast, thyroid, kidney and prostate. [1] There may be a lump, pain, or neurological signs from pressure. [1]
The oxidase catalyzes the transfer of four electrons from reduced plastoquinone to molecular oxygen to form water. The net reaction is written below: 2 QH 2 + O 2 → 2 Q + 2 H 2 O Analysis of substrate specificity revealed that the enzyme almost exclusively catalyzes the reduction of plastoquinone over other quinones such as ubiquinone and ...
The bone showed typical characteristics of cancer, including areas of cortical destruction, neoplastic bone formations, and disordered organization inconsistent with a simple fracture or infection. The structural and histological similarities with a high-grade human osteosarcoma case strengthened the diagnosis.
Bone metastasis, or osseous metastatic disease, is a category of cancer metastases that result from primary tumor invasions into bones. Bone-originating primary tumors such as osteosarcoma, chondrosarcoma, and Ewing sarcoma are rare; the most common bone tumor is a metastasis. [1] Bone metastases can be classified as osteolytic, osteoblastic ...