title: Daily variations of cerebral tyrosine in two inbred strains of mice and their F(1) hybrids.
abstract: The diurnal rhythms of endogenous cerebral tyrosine in 15 week-old mice from BALB/C/Orl and C57 BL/6/Orl strains and their reciprocal F(1) hybrids, placed on a fixed 12/12 h dark-light schedule, were determined over a 24 h period in the fore-brain and hind-brain. Significant inter-strain differences in mean tyrosine levels were described in both structures. The main finding was that BALB/C exhibited a significant 24 h rhythm whereas a 12 h rhythm was found in C57/BL. In F(1) hybrids, daily tyrosine rhythm appeared in both structures as a combination of the 2 parental ones. These findings support the suggestion that genetic factors may affect biological rhythms.
authors: Laboratoire de Physiologie, Faculté de Médecine, 27 Bd. Jean Moulin, 13385 Marseille, Cédex 4, France.
authors: J
authors: J
authors: Calcet-Veys
authors: P
authors: P
authors: Joanny
authors: F
authors: F
authors: Blanquet
authors: J L
authors: JL
authors: Valatix
authors: G
authors: G
authors: Chouvet