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BioNumbers is in its infancy and there are notable gaps in the available data. Search results often contain false positives.
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Amount of serotonin Desert locust Schistocerca gregaria locusts that behaved the most gregariously 12.78±1.85: more solitariously behaving locusts 4.18±0.27 pmol 113118
Anstey ML, Rogers SM... more
Blood platelet count Mouse Mus musculus 7.3e+5 (±70,000) platelets/µL 113116
Walther DJ et al., S... more
Estimated date when first 5-HT (serotonin) receptors have appeared in single-celled eukaryotes, such as paramecia Eukaryotes 700 - 800 Mya 113117
Rut Vleugels, Heleen... more
Fraction of total body serotonin that is released into the gut by intestinal enterochromaffin cells Unspecified ~95 % 113115
Berger M, Gray JA, Roth... more
Investment in reproductive structures as percent of total above-ground productivity Oak Quercus coccifera 2–27 % 100678
Johannes M. H. Knops... more
Number of dopamine neurons on either side of brain Mammals rats ~7,000 (~14,000 on both sides): rhesus monkey and human 200,000 (400,000 on both sides) dopamine neurons 113113
Schultz W. Multiple dopamine... more
Average decrease in number of cortical neurons from age 20 to 90 Human Homo sapiens ~9.5 % of neurons 112057
Drachman D (2005). "Do... more
Loss of brain weight from ages 50 - 90 Human Homo sapiens 2-3 % per decade 113114
Stark AK, Pakkenberg... more
Lipid composition of peroxisomal membrane of oleate-grown S. cerevisiae Budding yeast Saccharomyces cerevisiae phosphatidylcholine 48.2%: phosphatidylethanolamine 22.9%: phosphatidylinositol 15.8%:cardiolipin 7% % 113112
Kohlwein SD, Veenhuis M... more
Diameter of lipid droplets (LDs) Yeast typically 300nm-1µm: in late log/early stationary phase of growth 350-450nm N/A 113111
Kohlwein SD, Veenhuis M... more
Number of proteins in peroxisome Various animal and fungal ~50: plant ~100: Saccharomyces cerevisiae ≥66 proteins/peroxisome 113109
Sibirny AA. Yeast pe... more
Number of transport proteins in membrane Unspecified inner mitochondrial membrane ~50: peroxisome ≤10 proteins 113110
Sibirny AA. Yeast pe... more
Diameter of peroxisome Eukaryotes most peroxisomes 0.1-0.2µm: H. polymorpha, grown in the presence of methanol ≤1.5µm µm 113108
Michels PA, Moyersoen J... more
Fraction of proteins in glycosome that are glycolytic enzymes Protozoa kinetoplastid Trypanosoma spp. parasite Trypanosoma brucei >90%: trypanosomes living in the tsetse fly ~40-50% % of proteins that are glycolytic proteins 113107
Michels PA, Moyersoen J... more
Diameter of peroxisome Eukaryotes 0.1 to 1.0 μm 106729
Hu J. Molecular basis... more
Fraction of total cell volume occupied by ER Mammals <= (≤5) % 103542
Hansen RE, Roth D, Winther... more
Fraction of pancreatic islets (islets of Langerhans) out of total pancreas volume Human Homo sapiens ~4.487 % 113106
Ionescu-Tirgoviste C et al.... more
Dimensions of pancreas Human Homo sapiens length 25cm: volume 45cm^3 N/A 113105
Ionescu-Tirgoviste C et al.... more
Number of islets of Langerhans & total islet volume Human Homo sapiens total number of islets 3.6×10^6-14.8×10^6: total islet volume 0.5-1.3 cm^3 N/A 113104
Ionescu-Tirgoviste C et al.... more
Number of Islets of Langerhans in the pancreas Human Homo sapiens ~250,000 islets of Langerhans/pancreas 109961
Leslie, Robbins (eds.)... more