A unique mRNA species for a regulatory subunit of cAMP-dependent protein kinase is specifically induced in haploid germ cells

AbstractCyclic AMP (cAMP) and its action by way of cAMP-dependent protein kinase is important for sperm motility. Previous studies on germ cells have demonstrated a selective decrease in the amount of type I cAMP-dependent protein kinase during spermatid development, and that type II was the major form present in elongating spermatids and in mature sperm. This would indicate activation of a gene in haploid germ cells, encoding a regulatory subunit of type II protein kinase. However, haploid expression of such a gene has so far not been shown. In the present study we demonstrate high-levelled expression of a unique mRNA species for a specific regulatory subunit of type II cAMP-dependent protein kinase at late stages of spermatogenesis, i.e. during spermatid elongation

Teachers' perception of the students' foreign language learning and the potential role of ICT

This article focuses on the learning problems that arise in the teaching of second languages. Nowadays, the introduction of new technologies in this field has had a relevant effect by offering new possibilities that did not exist in the analogue era. However, many of the learning problems persist, and one of the causes identified is the change in learning styles. The use of new technologies has fostered an experimental learning style among students. This style is incompatible with traditional classes of theory and practice, in which an intellectual effort is required to understand the theory and then put into practice what has been learned. The present work starts from this reality and tries to provide possible improvements. For this, an analysis of the main problems encountered by the learners in the various linguistic acquisition components (lexicon, grammar and processes of comprehension and production, both oral and written) has been carried out. The method used was a questionnaire answered by 113 active language teachers. After the analysis of the answers received, a series of specific problems of the teaching-learning process was enumerated and different IT applications and ICT resources were searched that could solve or at least minimize them