public static Database getAccessionType(String accession){
        if(accession.contains("UNIMOD")){
            return Database.UNIMOD;
        } else if(!accession.contains("UNIMOD") && accession.contains("MOD")){
            return Database.PSIMOD;
        } else if(!accession.contains("MOD") && NumberUtils.isNumber(accession)){
            return Database.UNIMOD;
        } else{
            return Database.NONE;
        }
    }