Society for the Study of Amphibians and Reptiles a number of books and series including: Society for the Study of Amphibians and Reptiles The Society for the Study of Amphibians and Reptiles (SSAR) is an international herpetological society. It is a non-profit organization supporting education, conservation, and research related to reptiles and amphibians. Regular publications include the "Journal of Herpetology" and "Herpetological Review". It is the largest international herpetological society, and is recognized worldwide for having the most diverse program of publications, meetings, and other activities. The SSAR Conservation Committee brings conservation issues that affect reptiles and amphibians to the attention of state and federal government agencies, non-government
Hox genes in amphibians and reptiles anterior-posterior mesoderm of various developing animal models. One conclusion that this varied concentration of protein expression is actually causing differentiation amongst various tissues and could be one of the culprits behind these so-called "gradient fields". While the protein products of Hox genes are strongly involved in these fields and differentiation in amphibians and reptiles, there are other causality factors involved. For example, retinoic acid and other growth factors have been shown to play a role in these gradient fields. Hox genes in amphibians and reptiles Hox genes play a massive role in some amphibians and reptiles in their ability to