diff --git a/dhp-workflows/dhp-rdfconverter/src/main/java/eu/dnetlib/dhp/rdfconverter/bioschema/model/BioSchemaProtein.java b/dhp-workflows/dhp-rdfconverter/src/main/java/eu/dnetlib/dhp/rdfconverter/bioschema/model/BioSchemaProtein.java
index 8b71520b9..4e99f19d7 100644
--- a/dhp-workflows/dhp-rdfconverter/src/main/java/eu/dnetlib/dhp/rdfconverter/bioschema/model/BioSchemaProtein.java
+++ b/dhp-workflows/dhp-rdfconverter/src/main/java/eu/dnetlib/dhp/rdfconverter/bioschema/model/BioSchemaProtein.java
@@ -57,7 +57,7 @@ public class BioSchemaProtein {
 		@JsonProperty("https://schema.org/sameAs")
 		private List<Link> sameAs;
 		@JsonProperty("https://schema.org/hasSequenceAnnotation")
-		private Link hasSequenceAnnotation;
+		private List<Link> hasSequenceAnnotation;
 		@JsonProperty("https://schema.org/additionalProperty")
 		private List<Link> sequenceAnnotation;
 		@JsonProperty("https://schema.org/value")
@@ -202,11 +202,11 @@ public class BioSchemaProtein {
 			this.mainEntityOfPage = mainEntityOfPage;
 		}
 
-		public Link getHasSequenceAnnotation() {
+		public List<Link> getHasSequenceAnnotation() {
 			return hasSequenceAnnotation;
 		}
 
-		public void setHasSequenceAnnotation(Link hasSequenceAnnotation) {
+		public void setHasSequenceAnnotation(List<Link> hasSequenceAnnotation) {
 			this.hasSequenceAnnotation = hasSequenceAnnotation;
 		}
 
diff --git a/dhp-workflows/dhp-rdfconverter/src/main/java/eu/dnetlib/dhp/rdfconverter/utils/RDFConverter.java b/dhp-workflows/dhp-rdfconverter/src/main/java/eu/dnetlib/dhp/rdfconverter/utils/RDFConverter.java
index f284d49df..86b9ffd86 100644
--- a/dhp-workflows/dhp-rdfconverter/src/main/java/eu/dnetlib/dhp/rdfconverter/utils/RDFConverter.java
+++ b/dhp-workflows/dhp-rdfconverter/src/main/java/eu/dnetlib/dhp/rdfconverter/utils/RDFConverter.java
@@ -173,6 +173,8 @@ public class RDFConverter {
 					log.error("Identifier not found", e.getMessage());
 				}
 
+				mainTitles.add(" " + entry.getName() + " ");
+
 				dataciteProtein.setId(proteinId);
 				bioschemaProteins.put(entry.getId(), entry);
 				dataciteProteins.add(dataciteProtein);
@@ -211,8 +213,22 @@ public class RDFConverter {
 			.stream()
 			.filter(bioProtein -> Objects.nonNull(bioProtein.getValue().getHasSequenceAnnotation()))
 			.forEach(bioProtein -> {
-				sequenceAnnotations
-					.get(bioProtein.getValue().getHasSequenceAnnotation().getId())
+				List<String> seqAnnIds = bioProtein
+					.getValue()
+					.getHasSequenceAnnotation()
+					.stream()
+					.map(s -> s.getId())
+					.collect(Collectors.toList());
+				List<BioSchemaProtein.Link> propertyIds = sequenceAnnotations
+					.entrySet()
+					.stream()
+					.filter(s -> seqAnnIds.contains(s.getKey()))
+					.flatMap(s -> {
+						return s.getValue().stream();
+					})
+					.collect(Collectors.toList());
+
+				propertyIds
 					.stream()
 					.map(propertyId -> propertyValues.get(propertyId.getId()))
 					.filter(term -> Objects.nonNull(term))