Proteins are linear polymers formed by linking the a-carboxyl group of one amino acid to the a-amino group of another amino acid. This type of linkage is called a peptide bond or an amide bond. The formation of a dipeptide from two amino acids is accompanied by the loss of a water molecule.
Release date. The Galaxy S8 and S8+ are both available to pre-order from Wednesday 29 March, with early buyers set to receive their handset on 20 April. The smartphones will be available to all from 28 April.
Samsung Galaxy S9 leaks suggest all-new design â and a hardware controversy. The Samsung Galaxy S9 release day might be months away, but weâre already hearing whispers about the phoneâs hardware and design. You wait ages for a bus, and then two come along at once â and Galaxy S9 leaks are no different, apparently. This week weâve heard two different rumours about Samsungâs next flagship smartphone, which is expected to launch in early 2018.