1 Quaternary Structure-refers to the structure of a protein macromolecule formed by interactions between multiple polypeptide chains. 2  Each polypeptide chain is referred to as a subunit. 3  Proteins with quaternary structure may consist of more than one of the same type of protein subunit.
1 Set the plant in a water-proof container to protect your furniture. 2  Water the plant thoroughly when the soil surface is dry to the touch. 3  Discard any excess water which remains in the saucer after 10 minutes. 4  The bright colour of the bracts will remain longer if temperatures do not exceed 22Â°C.
When temperatures drop down to 55 degrees F/12.78 degrees C, poinsettias will find their flowering affected. When temperatures drop even further to 50 degrees C/10 degrees C, poinsettias suffer irreversible injury. No, poinsettias (Euphorbia pulcherrima) cannot tolerate cold. Specifically, poinsettias are native to semi-tropical and tropical areas of Latin America. They tend to prefer a temperature range of 60-80 degrees F/15.56-26.67 degrees C.