This determines differences in gene expression and cell differentiation. Thus it is part of gene expression and epigenetic regulation. It also plays a role in the analysis of gene and protein expression and regulation. This prevents even low levels of inappropriate gene expression. There are several layers of regulation of gene expression. They have been used as hosts for gene expression. Real-time PCR is useful in pathogen detection, gene expression and regulation, and allelic discrimination. Most target the transcription stage of genetic expression. The risk allele at this locus results in increased mRNA expression of FCGR2A. The effect of glucocorticoids on Fc receptor expression in immune cells is complicated. The presence of cytoplasmic expression is disregarded. She studied the correlation between anger expression and social influence perception. See activity coefficient for a derivation of this expression. Vegf is able to induce DLL4 expression. Subjects in these studies showed accuracy in judging emotions based on facial expression.