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A variant hemoglobin, called fetal hemoglobin (HbF, α 2 γ 2), is found in the developing fetus, and binds oxygen with greater affinity than adult hemoglobin. This means that the oxygen binding curve for fetal hemoglobin is left-shifted (i.e., a higher percentage of hemoglobin has oxygen bound to it at lower oxygen tension), in comparison to ...
The Mentzer index, described in 1973 by William C. Mentzer, [1] is the MCV divided by the RBC count. It is said to be helpful in differentiating iron deficiency anemia from beta thalassemia trait.
The SI unit of measure for equivalent dose is the sievert, defined as one Joule per kg. [11] In the United States the roentgen equivalent man (rem), equal to 0.01 sievert, is still in common use, although regulatory and advisory bodies are encouraging transition to sievert.
The total number of protein-coding genes (the Earth's proteome) is estimated to be 5 million sequences. [98] Although the number of base-pairs of DNA in the human genome has been known since the 1950s, the estimated number of genes has changed over time as definitions of genes, and methods of detecting them have been refined.
Typically, the cells of female humans contain two X chromosomes, while the cells of male humans have an X and a Y chromosome. [23] During early fetal development, all embryos have phenotypically female genitalia up until week 6 or 7, when a male embryo's gonads differentiate into testes due to the action of the SRY gene on the Y chromosome. [24]
In a healthy adult male of 75 kg (165 lb) with a blood volume of 5 L, a blood glucose level of 5.5 mmol/L (100 mg/dL) amounts to 5 g, equivalent to about a teaspoonful of sugar. [14] Part of the reason why this amount is so small is that, to maintain an influx of glucose into cells, enzymes modify glucose by adding phosphate or other groups to it.
Carbonic anhydrase was initially isolated and characterised from red blood cells in 1933, with simultaneous reports by Meldrum and Roughton (at Cambridge University in the United Kingdom) and by Stadie and O’Brien (at the University of Pennsylvania in the United States), [7] [8] both while searching for a "catalytic factor... necessary for rapid transit of the HCO 3 − [bicarbonate anion ...
19645 Ensembl ENSG00000139687 ENSMUSG00000022105 UniProt P06400 P13405 RefSeq (mRNA) NM_000321 NM_009029 RefSeq (protein) NP_000312 NP_000312.2 NP_033055 Location (UCSC) Chr 13: 48.3 – 48.6 Mb Chr 14: 73.42 – 73.56 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse The retinoblastoma protein (protein name abbreviated Rb or pRb ; gene name abbreviated Rb, RB or RB1) is a tumor ...