Demosthenes had five triremes and their complements of soldiers as a garrison, and was reinforced by 40 hoplites from a Messenian ship that happened to stop at Pylos.
Individual codons code for specific amino acids. A gene is a sequence of nucleotides along a DNA strand-with 'start' and 'stop' codons and other regulatory elements-that specifies a sequence of amino acids that are linked together to form a protein.
The 59-be are a diverse family of sequences that function as recognition sites for the site-specific integrase. Gene cassettes often carry antibiotic resistance genes. An example would be the kanMX cassette which confers kanamycin resistance upon bacteria or fungi. How these cassettes are initially created is not clear.