Within 5 to 10 min at 37 C, bacteria infected by bacteriophage OX174 acquire the ability to exclude superinfecting OX particles from reproducing themselves. The superinfecting phage are blocked at a stage prior to synthesis of the parental replicative form molecule; the superinfecting deoxyribonucleic acid remains as intact (infective) single strands. Establishment of superinfection exclusion a...

The amphibian Spemann organizer is subdivided in trunk and head organizer and it is unclear how this division is regulated. The Xenopus trunk organizer expresses anti-dorsalizing morphogenetic protein (ADMP), a potent organizer antagonist. We show that ADMP represses head formation during gastrulation and that its expression is activated by BMP antagonists. A specifically acting dominant-negati...

Utilization and requirement of egg protein in Japanese women with two levels of energy intake were estimated. In experiment 1, fifteen female students were given semi-purified diet containing whole egg as the sole nitrogen source for 12 days. Nitrogen intakes were 50 for five, 75 for two and 100 mg N/kg for eight subjects. Habitual energy intake was determined individually by detailed inquiry a...

Within 5 to 10 min at 37 C, bacteria infected by bacteriophage phiX174 acquire the ability to exclude superinfecting phiX particles from reproducing themselves. The superinfecting phage are blocked at a stage prior to synthesis of the parental replicative form molecule; the superinfecting deoxyribonucleic acid remains as intact (infective) single strands. Establishment of superinfection exclusi...

The 1985 FAO/WHO/UNU protein report defined reference amino acid patterns for infants based on breast milk and for preschool children, schoolchildren and adults from age specific estimates of dietary indispensible amino acid requirements divided by the safe protein requirement for each age group. This report argued that the protein quality of a diet should be estimated from its digestibility ad...

Kissing gourami culture has begun to be developed reduce the dependence on natural catches. Many factors that are influence fish culture. One of those is availability sufficient quantity and quality feed. Protein an important nutrient supports growth affects feed prices. The protein requirement for each needs known as a basis formulating This research aims determine optimum level kissing gouram...

The effect of two digestible protein levels (310 and 469 g/kg DM) on the relative lysine (Lys; g Lys/kg DM or g Lys/100 g protein) and the absolute Lys (g Lys intake/kg 0.75 per d) requirements was studied in rainbow trout fry using a dose-response trial. At each protein level, sixteen isoenergetic (22-23 MJ digestible energy/kg DM) diets were tested, involving a full range (2-70 g/kg DM) of si...