Exhibit 99.1
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, the undersigned agree to the joint filing of a Statement on Schedule 13G (including any and all amendments thereto) with respect to the Common Stock, $0.0001 par value per share, of BioAtla, Inc. and further agree to the filing of this Joint Filing Agreement as an exhibit thereto. In addition, each party to this Joint Filing Agreement expressly authorizes each other party to this Joint Filing Agreement to file on its behalf any and all amendments to such Statement on Schedule 13G.
| Date: April 28, 2022 | TANG CAPITAL PARTNERS, LP | |||
| By: | Tang Capital Management, LLC | |||
| Its: | General Partner | |||
| By: | /s/ Kevin Tang | |||
| Name: | Kevin Tang | |||
| Title: | Manager | |||
| TANG CAPITAL MANAGEMENT, LLC | ||||
| By: | /s/ Kevin Tang | |||
| Name: | Kevin Tang | |||
| Title: | Manager | |||
| /s/ Kevin Tang | ||||
| Name: | Kevin Tang | |||