C4 Photosynthesis: Convergence upon Convergence upon…
نویسندگان
چکیده
منابع مشابه
C4 Photosynthesis: Convergence upon Convergence upon…
C(4) photosynthesis has evolved independently numerous times in plants. New work suggests that these multiple origins are the result of recurring selection on a few amino acid positions in the key enzyme phosphoenolpyruvate carboxylase.
متن کاملEvolutionary switch and genetic convergence on rbcL following the evolution of C4 photosynthesis.
Rubisco is responsible for the fixation of CO2 into organic compounds through photosynthesis and thus has a great agronomic importance. It is well established that this enzyme suffers from a slow catalysis, and its low specificity results into photorespiration, which is considered as an energy waste for the plant. However, natural variations exist, and some Rubisco lineages, such as in C4 plant...
متن کاملC4 photosynthesis
The question then is how the same neurons convey two different sorts of information. The answer is that motor giants are capable of generating two types of action potentials, small/slow calcium spikes and large/fast sodium spikes, depending on the degree of depolarization it receives. As opposed to the input from the ring giant, the input from the pacemaker is too low to trigger the sodium spik...
متن کاملIntracellular Recording of the Convergence of Input upon Neurons in Cat Association Cortex.
Intracellular responses in anterior middle suprasylvian gyrus to peripheral stimuli (light flash, auditory click, and contralateral forepaw shock) and central stimuli (contralateral cortical and tha!amic stimulation) were studied in cats anesthetized with chloralose. When cells discharged to peripheral and some central stimuli, spikes arose from asynchronous, summating, depolarizing postsynapti...
متن کاملConvergence of Rad6/Rad18 and Fanconi Anemia Tumor Suppressor Pathways upon DNA Damage
Extremely high cancer incidence associated with patients with Fanconi anemia (FA) suggests the importance of the FA signaling pathway in the suppression of non-FA human tumor development. Indeed, we found that an impaired FA signaling pathway substantially contributes to the development of non-FA human tumors. However, the mechanisms underlying the function of the FA pathway remain less underst...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Current Biology
سال: 2007
ISSN: 0960-9822
DOI: 10.1016/j.cub.2007.07.004