enamel 发表于 2025-3-21 19:31:00
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Current theories of biological aging genetic or epigenetic level. The error theory, the redundant message theory, the codon restriction theory, and the transcriptional event theory represent the major current conceptualizations of biological aging as held by most gerontologists. The finding that cultured normal human and animal cellsInfelicity 发表于 2025-3-22 08:00:55
Towards a theory of developmenthed by viewing the egg as containing a program for development, and considering the logical nature of the program by treating cells as automata and ignoring the details of molecular mechanisms. It is suggested that development is essentially a simple process, the cells having a limited repertoire ofConjuction 发表于 2025-3-22 08:43:51
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Expression of specific clones during B cell developmentese specificities were found to be present in slightly higher frequency in neonatal than in adult spleens. The parameters of stimulation of neonatal B cells were similar to those of adult B cells but the antibody-forming cell progeny of neonatal B cells produce predominantly .M rather than .G antibo