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  2. Complementarity (molecular biology) - Wikipedia

    en.wikipedia.org/wiki/Complementarity_(molecular...

    Purines are larger than pyrimidines. Both types of molecules complement each other and can only base pair with the opposing type of nucleobase. In nucleic acid, nucleobases are held together by hydrogen bonding, which only works efficiently between adenine and thymine and between guanine and cytosine. The base complement A = T shares two ...

  3. Biological rules - Wikipedia

    en.wikipedia.org/wiki/Biological_rules

    The pygmy mammoth is an example of insular dwarfism, a case of Foster's rule, its unusually small body size an adaptation to the limited resources of its island home.. A biological rule or biological law is a generalized law, principle, or rule of thumb formulated to describe patterns observed in living organisms.

  4. Complementarity - Wikipedia

    en.wikipedia.org/wiki/Complementarity

    Complementarity (molecular biology), a property of nucleic acid molecules in molecular biology; Complementarity (physics), the principle that objects have complementary properties which cannot all be observed or measured simultaneously; Complementarity theory, a type of mathematical optimization problem

  5. Complementation (genetics) - Wikipedia

    en.wikipedia.org/wiki/Complementation_(genetics)

    Complementation refers to a genetic process when two strains of an organism with different homozygous recessive mutations that produce the same mutant phenotype (for example, a change in wing structure in flies) have offspring that express the wild-type phenotype when mated or crossed. Complementation will ordinarily occur if the mutations are ...

  6. Palindromic sequence - Wikipedia

    en.wikipedia.org/wiki/Palindromic_sequence

    Palindrome of DNA structure A: Palindrome, B: Loop, C: Stem A palindromic sequence is a nucleic acid sequence in a double-stranded DNA or RNA molecule whereby reading in a certain direction (e.g. 5' to 3') on one strand is identical to the sequence in the same direction (e.g. 5' to 3') on the complementary strand.

  7. Complement system - Wikipedia

    en.wikipedia.org/wiki/Complement_system

    The complement system, also known as complement cascade, is a part of the humoral, innate immune system and enhances (complements) the ability of antibodies and phagocytic cells to clear microbes and damaged cells from an organism, promote inflammation, and attack the pathogen's cell membrane. [1]

  8. Complementary event - Wikipedia

    en.wikipedia.org/wiki/Complementary_event

    The complement of an event A is usually denoted as A′, A c, A or A. Given an event, the event and its complementary event define a Bernoulli trial : did the event occur or not? For example, if a typical coin is tossed and one assumes that it cannot land on its edge, then it can either land showing "heads" or "tails."

  9. Complement control protein - Wikipedia

    en.wikipedia.org/wiki/Complement_control_protein

    Complement control proteins are proteins that interact with components of the complement system. The complement system is tightly regulated by a network of proteins known as "regulators of complement activation (RCA)" that help distinguish target cells as "self" or "non-self."

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