The Argentinian mammarenavirus genome is composed of two single-stranded RNA molecules, each encoding two different genes in an ambisense orientation. The two segments are termed 'short (S)' and 'long (L)' owing to their respective lengths.
The Argentinian mammarenavirus genome includes two single-stranded RNA molecules, each containing two distinct genes oriented in both directions. The shorter segment is labeled 'short (S)' and the longer one 'long (L)', based on their sizes.