protein: Cdc28p (the p is optional)
A gene is indicated by a 3 lowercase italic letters, followed by an uppercase italic letter when multiple genes function in a similar process. The three letters often indicate the function of the gene. If the function is unknown, the name starts with a y. Sometimes the uppercase letter also indicates a function, as in "O" for operator or "R" for repressor.
An allele is indicated by a number following the gene name. If the specific gene of a class that is mutated is not known, the allele follows a hyphen (xyz-1).
The phenotype is a three letter combination with the first letter capitalized. A superscript + or - can be added to indicate wild-type or mutant phenotype, and an R or S can be used to signify Resistance or Sensitivity to a particular drug or antibiotic (AmpR).