 CREATE TABLE `cell_type` (
    `cell_type_id` int(10) unsigned NOT NULL auto_increment,
    `name`  varchar(120) not NULL,
-   `display_label` varchar(30) default NULL,
+   `display_label` varchar(30) default NOT NULL,
    `description` varchar(80) default NULL,
    `gender` enum('male', 'female', 'hermaphrodite', 'mixed') default NULL,
    `efo_id` varchar(20) DEFAULT NULL,

   `cell_type_id`     int(10) unsigned default NULL,
   `experiment_id`    int(10) unsigned default NULL,
   `feature_type_id`  int(10) unsigned default NULL,
   `feature_class`    enum('result', 'dna_methylation') DEFAULT NULL,
   `name`             varchar(100) default NULL,
   `replicate`        tinyint(3) unsigned NOT NULL,
   PRIMARY KEY  (`result_set_id`),

DROP TABLE IF EXISTS regbuild_string;
CREATE TABLE `regbuild_string` (
  `regbuild_string_id` int(10) NOT NULL auto_increment,
  `name` varchar(150) NOT NULL,
  `species_id` smallint(5) unsigned NOT NULL default '1',
  `string` text NOT NULL,
  PRIMARY KEY  (`regbuild_string_id`),
