Polycomb group (PcG) protein-mediated gene silencing is a major regulatory mechanism in higher eukaryotes that affects gene expression at the transcriptional level. Here, we report that two conserved homologous PcG proteins, RING1A and RING1B (RING1A/B), are required for global H2A monoubiquitination (H2Aub) in Arabidopsis. The mutation of RING1A/B increased the expression of members of the SQU...

This paper describes a technique based on network grammars and abstraction to verify families of state transition systems The family of state transition systems is represented by a context free network grammar Using the structure of the network grammar our tech nique constructs an invariant which simulates all the state transition systems in the family A novel idea used in this paper is to use ...

This paper describes a technique based on network grammars and abstraction to verify families of state-transition systems. The family of state-transition systems is represented by a context-free network grammar. Using the structure of the network grammar our technique constructs an invariant which simulates all the state-transition systems in the family. A novel idea used in this paper is to us...

OBJECTIVE This study's aim was to investigate the association between family structure and different health-related outcomes in adolescence (self-rated health, emotional and behavioural problems, health-related quality of life, regular smoking, and heavy episodic drinking). Furthermore, we analysed the extent to which socio-economic status, family cohesion and the pre-transition health status e...

We investigate the conditions that produce a phase transition from an ordered to a disordered state in a family of models of two-dimensional elements with a ferromagnetic-like interaction. This family is defined to contain under the same framework, among others, the XY-model and the Self-Driven Particles Model introduced by Vicsek et al. Each model is distinguished only by the rules that determ...

In this study of 62 African American families living in poverty, we examined the main and interactive effects of psychological, family, and school factors on students’ grade point average across the middle school transition. Both parent interviews and student surveys were collected, resulting in three major findings. First, students experienced a significant decline in grade point average acros...

OBJECTIVE This study examined the process of health care transition (HCT) posing the following questions: What are the transition experiences of youths and young adults with disabilities and special health care needs, family members, and health care providers? What are promising practices that facilitate successful HCT? What are obstacles that inhibit HCT? METHODS A qualitative approach was u...

Refugee families face a complex transition due to the nature of involuntary migration and the process of acculturation. There are several risk factors to the family adaptation process during the transition period, which are sociocontextually environmental dependant. Facilitating a healthy transition for refugee families, therefore, requires the role of nursing to incorporate sociopolitics into ...