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.
6. Water the periwinkle plants to a depth of 2 inches immediately after planting them. Run the water onto the soil at ground level rather than watering from overhead since moisture on the foliage creates ideal conditions for a fungal infection called vinca stem blight (Phomopsis livella). 1  Dig This.