| mappine | <chemical> An indole alkaloid with hallucinogenic effects, isolated from Piptadenia spp (Mimosidae), first isolated from skin glands of toad (Bufo sp). (18 Nov 1997) |
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| mapping | See: gene mapping, linkage map, physical map. (09 Oct 1997) |
| mapping function | In linkage analysis, a formula that converts the recombination fraction (which is on the probability scale) into map distance (in morgans). (05 Mar 2000) |
| mapping, gene | Charting the positions of genes on chromosome and learning the distance, in linkage units or physical units, between genes. (12 Dec 1998) |
| maprotiline | <drug> This drug is used to treat depression, it works by blocking the uptake of noradrenaline in the brain. (09 Oct 1997) |
| MAPs | Microtubule-associated proteins, may form part of the electron lucent zone around a microtubule. MAP1A and 1B approximately 350 kD) from brain, form projections from microtubules, MAP2A and 2B (270 kD) are also from brain microtubules and form projections. MAP3 (180 kD) and MAP4 (220-240 kD) have been described as co purifying with MAPs 1 and 2. Microtubule-associated protein 2 is associated with axonal processes of vertebrate nerve cells and its presence distinguishes them from dendritic processes. MAP1C is in a separate class, being a motor molecule. (18 Nov 1997) |
| fate map | <embryology> Diagram of an early embryo (usually a blastula) showing which tissues the cells in each region will give rise to (i.e. Their developmental fate). Fate maps are normally constructed by labelling small groups of cells in the blastula with vital dyes and seeing which tissues are stained when the embryo develops. (18 Nov 1997) |
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| linkage map | <genetics> A map of the relative positions of genetic loci on a chromosome, determined onthe basis of how often the loci are inherited together. Distance ismeasured in centimorgans (cM). (09 Oct 1997) |